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Question 1

How to multiply by 12.5%

Answer 1

Divide by 8

Question 2

16% of 25M

Answer 2

4M (percentage swap –> 25% of 16 since 25 is a clean number and 16 isn’t)

Question 3

12% of 50B

Answer 3

6B (percentage swap to do 50% of 12B)

Question 4

28% of 50M

Answer 4

14M (percentage swap)

Question 5

45% of 120M

Answer 5

54M (half and swap)

Question 6

Two methods for multiplying by .75

Answer 6

Method 1:
n/4 then multiply by 3

Method 2:
Subtract 1/4 of n from n

(b/c factorization is 3/4 * 10)

Question 7

How to multiply by .15 or 15%

Answer 7

( N/2 + N ) / 10