8th grade math help?

Question

Find the percent of each number mentally

1)75% of 64

2)25% of 52

3)33 1/3% of 27

4)90% of 80

Answer 1

1)75% of 64 = 0.75 x 64 = 48

2)25% of 52 = 0.25 x 52 = 13

3)33 1/3% of 27 = 0.33333.... x 27 = 27/3 = 9

4)90% of 80 = 0.9 x 80 = 72

Answer 2

1. divide by 4 - and multiply by 3
2. divide by 4
3. divide by three
4. take 10% and subtract from 80

ah , you can do it !!!!!