Question

5 over 30 = x over 90

Answer 1

30 times 3 gives you 90 so 5 times 3 is 15.

Answer 2

`(5)/(30) =(x)/(90)`

Match the denominators:

`(5)/(30) *(3)/(3)= (15)/(90)`

x = 15

Check your work:

`(15)/(90) / (3)/(3) = (5)/(30)`

We know that x = 15