Question

Last year at a certain high school, there were 140 boys on the honor roll and 68 girls on the honor roll. This year, the number of boys on the honor roll increased by 5% and the number of girls on the honor roll increased by 25%. By what percentage did the total number of students on the honor roll increase? Round your answer to the nearest tenth (if necessary).

Answer 1

11.5%

Explanation:

Last year:

Boys: 140

Girls: 68

Total: 208

This year:

Boys: 105% of 140 = 1.05 × 140 = 147

Girls: 125% of 68 = 1.25 × 68 = 85

Total: 232

percent change = (new - old)/new × 100%

percent change = (232 - 208)/208 × 100%

percent change = 11.5%