Question

A pet store sells puppies and kittens in the ratio 5 : 4 . If their sales of puppies and kittens combined came to 36, how many puppies did they sell?

Answer 1

36/9=4
5*4=20 puppies and 4*4=16 kittens.
**
ratio 5:4. This means that there is a number that if you multiply it by 5 you get the number of puppies, and if it is multiplied by 4 you get the number of kittens. This is like 5x+4x, which is 9x. so, just solve 9x=36 and get x.