Simplify the fraction by the simplification number.

**Step 1: Calculate the numerator**

To calculate the new *numerator*, divide the numerator of the fraction (20) by the simplification number (20):

Numerator = 20 ÷ 20 = 1

**Step 2: Calculate the denominator**

To calculate the new *denominator*, divide the denominator of the fraction (100) by the simplification number (20):

Denominator = 100 ÷ 20 = 5