answersLogoWhite

0

You simplify by finding a common factor of the two numbers greater than 1. In other words, you look for another number (greater than 1) which evenly divides into both the numbers in the fraction. 21 and 28 both divide by 7 to give 3 and 4 respectively. So we can simplify to 3/4.

User Avatar

Wiki User

12y ago

What else can I help you with?