What will be the lowest common denominator for the fractions 2/3 and 4/5?

A.

30

B.

15

C.

9

D.

18

To find the lowest common denominator between the fractions, what you need to do is simply write out the multiples of both 3 and 5 and find what multiple is common between both:

3,6,9,12,15

5,10,15

The multiple that is common and is the lowest in both would be 15.

The solution thus is B. 15, it is the LCD for the fractions of 2/3 and 4/5.