Question

Last year at a certain high school, there were 124 boys on the honor roll and 125 girls on the honor roll. This year, the number of boys on the honor roll decreased by 25% and the number of girls on the honor roll decreased by 20%. By what percentage did the total number of students on the honor roll decrease? Round your answer to the nearest tenth (if necessary).

Answer 1

22.5%

Explanation:

Last year, there were 124 boys and 125 girls, meaning 249 total.

This year, if boys decreased by 25%:

`0.25 * 124 = 31.`

A decrease of 31 boys.

If girls decreased by 20%:

`0.2 * 125 = 25.`

A decrease of 25 girls.

If there was a total decrease of 56 students from last year to this year, the total decrease is:

`56/249*100=22.5.`

A decrease of 22.5%.