Successive Percentages

In a school, 40% of the students come by public transport. Of those who come by public transport, 5% use the train.

What percentage of all the school's students come by train?

2% of the school come by train

In a town, 90% of the 20,000 adults who live there have a job.

Of these workers, 40% are female.

a) How many adult females in this town have a job?

b) How many adults males in this town have a job?

a) 7,200 female adults have a job

b) 10,800 males have a job

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