Question

Juan's class has 10 girls and 15 boys. the ratio of girls to boys in Steven's class is the same as the ratio of girls to boys in Juan's class. there are 21 boys in Steven's class. write a proportion that can be used to find the number of girls,g,in Steven's class.

proportion________
part B
use what you know about proportions to explain how to determine if there are 16 girls in Steven's class.​

Answer 1

The proportion is
`(girls)/(boys)` or
`(10)/(15)` =
`(x)/(21)` cross multiply to get 10*21 = 15x; simplify that to 210 = 15x then divide both sides by 15 to get 14 = x so no, there is not 16 girls in the class, there is 14