Question

Hi friends. Which is a common denominator of 1/4 and 3/5? Please explain how you got this answer.

Answer 1

list the multiples

4,8,12,16,20,24,28,32,36,40

5,10,15,20,25,30,35,40,45,50

They both have 20 and 40 as a common factor. 20 is the smallest common factor.

If you have any questions pls ask

Explanation:

Answer 2

5/20 and 12/20

Explanation:

To find the LCD ( Least Common Denominator) you need to find a multiple that is in the least amount. You first start by listing common multiples.

For 1/4 there are 8, 12, 16, and 20.

You get this by finding multiples of 4.

For 3/5 there is 10, 15, 20, and 25.

The Common multiple is 20 and it is the least.

This means 20 is the now the common denominator.

Multiply to get the equivalent self.

1/4 = 5/20, you multiply by 5/5.

3/5 = 12/20, you multiply by 4/4

The fraction have the same value because you multiply them by 1.