Question

There are 10 boys in Mr. Lee's class. If 40% of the class are boys, which is the total number of students in Mr. Lee's class?

Answer 1

25

Explanation:

2.5 =10%

2.5*4= 10

2.5*6=15

Answer 2

25

Explanation:

Using P=(%)w we can substitute the values. First, I will define the variables. P = part (is), % = percent, w = whole (of)

10 = (40%)w

The reason for this is because 10 is a PART and 40% is a PERCENT and we are solving for the unknown WHOLE. We now divide 10 by 0.40 because to convert a percent to a decimal you just move the point two places to the left:)

10 divided by 0.4 = 25. So, there is a total of 25 students in Mr. Lee's class. Now, we can check this by multiplying 25 and 0.4 to get 10! It is in fact correct.

PLEASE READ PRACTICE AND UNDERSTAND! DO NOT JUST TAKE THE ANSWER. KNOWLEDGE IS POWER :^)