Question

18. What is the least common denominator of the following
fractions? 3/10 and 1/4

Answer 1

20

The denominators of 3 /10 and 1 /4 are 10 and 4.

The factors of 10 are 2 × 5 and 2 × 2

Therfore the LCD should have two 2's and one 5.

This means the answer is:

2 × 2 × 5 = 20

I hope this helps :)