Question

What is the LCD of 5/12 and -9/16 ?

Answer 1

List the multiples of 12 and 16

Multiples of 12: 12, 24, 36, 48, 60
Multiples of 16: 16, 32, 48, 64, 80

So, the LCD of 12 and 16 is 48.

Least Common Denominator is the same thing as Least Common Multiple.

Answer 2

The least common denominator of 5/12 and -9/16 

The answer is 48.

Now, we have to change the numerators also to make this a equal fraction to the first ones we had.

5*4 = 20
12*4 = 48

20/48

-9*3 = -27
16*3 = 48

-27/48