10%
5%
15%
20%
100

how do you find 10% of a number 

move the decimal one spot to the left 

100

how do you find 5% of a number 

find 10% and half it or divide the number by 2 

100

how do you find 15% of a number 

find 10% then 5% then add 10% and 5% then you get your answer  

100

how do you find 20% of a number 

find 10% and then double the number 

200

what is 10% of the number 28

2.8

200

what is 5% of the number 28

4.3

200

what is 15% of the number 28

4.2

200

what is 20% of the number 32

6.4 

300

what is 10% of the number 78

7.8

300

what is 5% of the number 39

1.95

300

what is 15% of the number 127

19.05

300

what is 20% of the number 30

6.0

400

what is 10% of the number 200

20.0

400

what is 5% of the number 126

6.3

400

what is 15% of the number 50

7.5

400

what is 20% of the number 16

32

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