Question

Ava is trying to add together 3/5 and 2/9

Her first step is to rewrite the fractions using their lowest common denominator.
What denominator should she use?

Answer 1

Answer: 45

Step-by-step explanation:

The LCM of 5 and 9 is 5*9 = 45

This is the LCD of the two fractions.

• 3/5 = 27/45 after multiplying top and bottom by 9
• 2/9 = 10/45 after multiplying top and bottom by 5

So,

3/5 + 2/9 = 27/45 + 10/45 = 37/45