Question

Choose the best score on a quiz.

Answer 1

Simplify all the numbers.
Compare then 
21    20
3    4
5   7
You can eliminate B. since a already beat it.

A.

Answer 2

15 points out of 25 = 60%
8 points out of 14 = 57%
25 points out of 45 = 55% 
75 points out of 150 = 50% 

15 points out of 25 is the highest percent 
The answer is A 

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EXAMPLE HOW TO FIND PERCENT 

Lets do 10 out of 50

To calculate percent you do 

10 divided by 50 = 0.2
now you do 0.2 times 100 = 20
20 is the percent