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Quizzes > Mathematics

1/5 in Percentage: Quick Quiz on Fractions and Decimals

Quick practice with instant feedback. Master 1/5 as a percentage and decimal.

Editorial: Review CompletedCreated By: Javier MezaUpdated Aug 24, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for a quiz on converting one fifth to decimal and percentage on coral background

This quiz helps you convert 1/5 as a percentage and as a decimal, step by step. Answer quick questions, get instant feedback, and use the same method on similar fractions. For more practice, try our fraction to decimal quiz, percentage quiz, or decimal quiz today.

What is 1/5 as a decimal?
0.5
0.02
0.2
2.0
To convert a fraction to a decimal, divide the numerator by the denominator: 1 ÷ 5 = 0.2. This yields a terminating decimal. Learning more about converting fractions to decimals can help with other fractions as well.
What is 1/5 as a percentage?
20%
2%
5%
50%
To convert a fraction to a percentage, first convert to decimal (0.2) and then multiply by 100 to get 20%. Percent means per hundred, so 0.2 × 100 = 20%. This is a basic percentage conversion.
Which of the following fractions is equivalent to 1/5?
5/25
4/20
3/15
2/10
To find an equivalent fraction, multiply numerator and denominator by the same number. Multiplying 1/5 by 2/2 gives 2/10. The other options simplify to different values.
If you have 100 apples and you take 1/5, how many apples do you have?
25
15
20
10
Taking 1/5 of 100 means multiplying 100 by 0.2, which equals 20. This directly uses fraction-to-decimal conversion in a real context. It's a simple application of 1/5.
What is 1/5 of 50?
15
20
10
5
1/5 of 50 is computed as 50 × 1/5 = 10. This uses the same division approach: 50 ÷ 5 = 10. Practice with different totals improves fraction fluency.
What fraction does the percentage 20% represent when simplified?
1/10
1/4
1/5
2/5
20% means 20 out of 100, or 20/100, which simplifies by dividing numerator and denominator by 20 to 1/5. Simplifying percentages to fractions is a common skill.
Express 1/5 as parts per thousand (‰).
20‰
2‰
200‰
2000‰
To convert a fraction to per mille, multiply the decimal form (0.2) by 1000, giving 200‰. Per mille means parts per thousand.
A class has 30 students and 1/5 of them are absent. How many students are absent?
8
6
5
4
Calculate 1/5 of 30 by dividing 30 by 5, which equals 6. This applies fraction skills to real scenarios.
A student scored 20% on a 50-point quiz. How many points did they earn?
15
20
10
5
20% of 50 is 0.2 × 50 = 10. This applies percentage conversion to point-based grading.
A car's value is $20,000 and it depreciates by 20%. What is its value after depreciation?
$14,000
$18,000
$15,000
$16,000
Depreciation of 20% means the car retains 80% of its value: 0.8 × 20,000 = $16,000. This is common in finance and accounting calculations.
If a recipe needs 5 cups of flour, how many cups do you need for one-fifth of the recipe?
0.5
1
2
3
One-fifth of 5 cups is 5 × 1/5 = 1 cup. Scaling recipes uses the same fraction principles.
Out of 25 apples, 1/5 are rotten. How many rotten apples are there?
3
4
5
6
Calculate 25 × 1/5 = 5 rotten apples. This is a direct fraction application in a count context.
What is 1/5 of 1,000 feet expressed in feet?
200
100
250
150
One-fifth of 1,000 feet is 1,000 × 1/5 = 200 feet. This helps link fractions with large totals.
Which expression simplifies to 1/5?
(4/5) - (1/5)
(1/5) * 5
(3/5) - (2/5)
(2/5) + (1/5)
Subtracting 2/5 from 3/5 gives (3/5 ? 2/5) = 1/5. The other operations yield different results.
A shirt costs $40 and has a 20% discount. What is the sale price?
$28
$30
$32
$34
A 20% discount reduces the price by $8 (0.2 × 40), yielding $32. Discounts use percentage subtraction from the original.
In a group of 20 people, 4 are left-handed. What percent are left-handed?
10%
25%
20%
15%
Left-handed fraction is 4/20 = 1/5, and 1/5 as a percentage is 20%. This links fraction and percentage directly.
A laptop's price is increased by 20% then decreased by 20%. What is the net percentage change?
4%
0%
-8%
-4%
Increasing by 20% multiplies by 1.2, then decreasing by 20% multiplies by 0.8. The net factor is 1.2 × 0.8 = 0.96, a 4% decrease.
In a solution mixed at a ratio of 1:4 (acid to water), what percentage of the solution is acid?
20%
18%
25%
15%
The total parts are 1 + 4 = 5, so the acid fraction is 1/5 which equals 20%. Ratio problems convert directly to fractions.
Calculate (1/5 + 2/3) and express the result in decimal form, rounded to three decimal places.
0.867
0.667
0.733
0.933
Convert to a common denominator: 1/5 + 2/3 = 3/15 + 10/15 = 13/15 ? 0.866... which rounds to 0.867.
If 20% of y equals 30% of x and x is 50, what is y?
30
50
75
25
Set up the equation 0.2y = 0.3 × 50 = 15, so y = 15 / 0.2 = 75. This combines percent and algebra.
Simplify 2 * (1/5)^2 and express as a decimal.
0.2
0.08
0.04
0.01
(1/5)^2 = 1/25, and 2 × 1/25 = 2/25 = 0.08. This applies exponent rules with fractions.
You are taking a 3-hour exam and you have used 1/5 of your time. How many minutes have you used?
45
30
24
36
Three hours is 180 minutes. One-fifth of 180 is 36 minutes. Time conversion with fractions is common in scheduling.
Solve for x: (1/5)x - 4 = 6.
10
50
20
40
Add 4 to both sides to get (1/5)x = 10, then multiply by 5 to find x = 50. This combines fractions with basic algebra.
On a map with scale 1:50,000, a distance of 0.5 cm on the map represents how many meters in reality?
500
125
50
250
0.5 cm on the map × 50,000 = 25,000 cm in reality. Converting to meters gives 25,000 ÷ 100 = 250 meters. Map scale uses direct proportionality.
Solve for x: (1/5)^x = 1/125.
5
-3
3
-5
Recognize that 1/125 = 1/(5^3) = (1/5)^3, so x = 3. This uses properties of exponents.
The price of an item is increased by 1/5 and then decreased by 1/6. What is the overall percentage change?
4%
1%
-1%
0%
An increase of 1/5 multiplies by 1.2, then a decrease of 1/6 multiplies by 5/6 ?0.8333. The net factor is 1.2 × 0.8333 = 1, so there is no overall change.
x and y are inversely proportional. When x = 1/5, y = 10. What is y when x = 1?
2
10
5
0.2
Inverse proportionality means xy = k. Here k = (1/5) × 10 = 2. When x = 1, y = k/x = 2/1 = 2.
0
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Study Outcomes

  1. Convert 1/5 into a Decimal -

    Apply fraction-to-decimal conversion methods to accurately express 1/5 as a decimal and master the technique for similar problems.

  2. Transform 1/5 into a Percentage -

    Use decimal-to-percentage conversion rules to change 1/5 into a percentage, reinforcing your skills in percentages conversion tests.

  3. Simplify and Compare Ratios -

    Practice simplifying the ratio 1:5 and comparing it with other ratios to enhance your understanding of proportions and simplify ratios quizzes.

  4. Analyze Conversion Steps -

    Identify each step in the process of converting fractions to decimals and percentages, ensuring you can pinpoint and correct common mistakes.

  5. Interpret Decimal and Percentage Equivalents -

    Interpret decimal and percentage results in real-world contexts, recognizing how fraction, decimal, and percentage relationships apply outside the quiz.

  6. Evaluate Your Skills with Instant Feedback -

    Engage with our scored quiz to receive real-time feedback on your performance, helping you gauge your proficiency and areas for improvement.

Cheat Sheet

  1. Divide to Decimal -

    When converting 1/5 as a decimal, divide 1 by 5 to get 0.2, following the convert fraction to decimal method taught by Khan Academy. This solid foundation ensures you understand how fractions translate into decimals.

  2. Convert Decimal to Percentage -

    To express 0.2 from 1/5 as a percentage, multiply by 100 to get 20%, a core decimal to percentage skill found in percentages conversion test questions. MIT OpenCourseWare confirms this universally accepted formula across all ratios. Practicing this conversion solidifies your confidence in real-world scenarios.

  3. Simplify Ratios for Insight -

    Viewing 1/5 as a ratio simplifies to 1:5, reinforcing the relationship between parts in a simplify ratios quiz context. This equivalence highlights that one part out of every five is 20% of the whole. Mastering ratio notation deepens your overall fraction and percentage fluency.

  4. Use Mnemonics to Remember -

    A catchy mnemonic like "Five gives twenty" connects 1/5 directly to 20% and helps in any percentages conversion test. Educational studies from the University of Cambridge show that simple memory phrases boost recall speed. Repeat this phrase whenever you face similar fraction problems.

  5. Practice with Related Fractions -

    After mastering 1/5 as a decimal and percentage, challenge yourself with 2/5 (40%), 3/5 (60%) and 4/5 (80%) to reinforce patterns. Use mixed-format quizzes, including simplify ratios quiz and percentages conversion test styles, for varied practice. Regular drills from journals like the Journal of Mathematical Behavior build speed and accuracy.

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