Answer: 25%
Explanation:
1. Turn it into a fraction (15/20)
2. Divide the numerator (15) by the denominator (20). (15÷20=0.75)
3. Subtract 0.75 from 1 (1-0.75=0.25)
4. Turn 0.25 into a percentage by taking away the “0.” and adding a “%” at the end (25%)