Answer:
1 is what percent of 10?
rate = (1 ÷ 10) × 100
= 0.1 × 100
= 10%
2) 10 is what percent of 20?
rate = (10 ÷ 20) × 100
= 0.5 × 100
= 50%
3) 5 is what percent of 25?
rate = (5 ÷ 25) × 100
= 0.2 × 100
= 20%
4) What percent of 80 is 56?
rate = (56 ÷ 80) × 100
= 0.7 × 100
= 70%
5) What percent of 20 is 15?
rate = (15 ÷ 20) × 100
= 0.75 × 100
= 75%
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