Question

There are 357 seniors in Harris High School. The ratio of boys to girls is 7 . 10 How many boys are in the senior class? @mitu12

Answer 1

So there are 147 boys and 210 girls

Answer 2

When working out ratios, we must add the radio (7 and 10), this is 17

this means there are 17 parts, and boys take up 7 of those parts and the girls take up 10 of them.

If there are 17 parts and there are 357 seniors, then divide 357 by 17 to find how many seniors in each part, 357/17 = 21

if there is 21 seniors in each part, the boys make up 7 parts, so there are 7*21 = 147