Learn Immediately Flashcards
1
Q
How to multiply by 12.5%
A
Divide by 8
2
Q
16% of 25M
A
4M (percentage swap –> 25% of 16 since 25 is a clean number and 16 isn’t)
3
Q
12% of 50B
A
6B (percentage swap to do 50% of 12B)
4
Q
28% of 50M
A
14M (percentage swap)
5
Q
45% of 120M
A
54M (half and swap)
6
Q
Two methods for multiplying by .75
A
Method 1:
n/4 then multiply by 3
Method 2:
Subtract 1/4 of n from n
(b/c factorization is 3/4 * 10)
7
Q
How to multiply by .15 or 15%
A
( N/2 + N ) / 10
