Question

the ratio of dogs to cats at the pet store is 1:4.if the pet shop has 7 dogs,how many cats does it have ?

Answer 1

`1:4=(1)/(4)\\\\d-number\ of\ dogs;\ c-number\ of\ cats\\\\d:c=1:4\to(d)/(c)=(1)/(4)\\\\d=7\ therefore\\\\(7)/(c)=(1)/(4)\ \ \ \ |cross\ multiply\\\\1\cdot c=7\cdot4\\\\\boxed{c=28}\leftarrow answer`