Answer:

1) 1 is what percent of 10?

1\10=0.1

0.1*100=10%

Therefore, 1 is 10% of 10

2) 10 is what percent of 20?

10\20=0.5

0.5*100=50%

Therefore, 10 is 50% of 20.

3) 5 is what percent of 25?

5\25=0.2

0.2*100=20%

Therefore, 5 is 20% of 25.

4) What percent of 80 is 56?

56\80=0.7

0.7*100=70%

Therefore, 56 is 70% of 80.

5) What percent of 20 is 15?

15\20=0.75

0.57*100=75%

Therefore, 15 is 75% of 20.

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Step-by-step explanation: