Answers and Explanation please.

( Cousin needs help, Im terrible with this kind of stuff)

1. 64% of 75 Tiles =
   
2. 10% of 70 plants=
   
3. 32% of 25 pages=
   
4. 85% of 40 emails
   
5. 72% of 350 friends=
   
6. 5% of 220 files=
   
7. 4 students is ___% of 20 students
   
8. 4% of ___ days is 56 days
   
9. 60 minutes is 20% of ___ minutes
   
10. 80% of ___ games is 32 games
    
11. 360 kilometers is 24% of ___ kilometers
    
12. 9 stores is 3% of ___ stores
    
13. 200 songs, 24 of them are country songs. ___% of the songs are country
    
14. Sales tax= 7%. Amanda paid 35$ in sales tax on a stereo. What was the price of the stereo? ___
    
15. Monica paid a sales tax of 1.50$ when she bought a helmet. if the sales tax rate was 5% how much did the store charge for the helmet before tax? ___
    
16. How many hours per day does Becky spend on each activity.
    

Sleep: 40%

School: 25%

Eating: 10%

Free Time: 15%

Homework: 10%

School: ___ hours

Eating: ___ hours

Sleep: ___ hours

Homework:___ hours

Free Time:___ hours