The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?
Q1. The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?
Answer: 21:22
Explanation: New boys = 7k × 1.20 = 8.4k; new girls = 8k × 1.10 = 8.8k; ratio = 8.4:8.8 = 21:22.