Question

What is 30/45 in simplest form?

Answer 1

Its 2/3
divide the numerator and denominator by 15 and you get 2/3

Answer 2

30/45

What numbers multiply to equal 30,and 45? 

30: 1*30 ,2*15, 3*10, 5*6, 
45: 1*45, 3*15, 5*9, 

Look for the LARGEST number that they have in common. 
15 is the largest number they have in common! Replace those multiplications with the numbers... like a so: 

30/45 = (2*15)/(3*15)

The 15's will cancel out of the problem leaving us with the simplest form of the fraction. 

2/3!