Express 3/4, 7/16, and 5/8 with the LCD

The LCD (lowest common denominator) is the lowest common denominator of two or more fractions.

4 = 2²

16 = 2⁴

8 = 2³

Take common and non-common factors with highest exponent.

So LCD = 16

The new dneominator of all fractions is 16. Divide this number for the original denominators and multiply for numerator ...

16/4 = 4

4*3 = 12

3/4 = 12/16

16/16 = 1

1*7 = 7

7/16 = 7/16

16/8 = 2

2*5 = 10

5/8 = 10/16