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Maths Exercices

Find what percent one number is of another: word problems

There are 25 students in a class. Sixteen of those students are men. What percent of the class are men?

Proportions can be used to solve percent problems.

part
_____
whole
 = 
percent
______
100

Find what percentage 16 is of 25. The part is 18. The whole is 25.

Let n represent the percent.

Write a proportion and find the cross products to solve for n.

 = 

25n  =  16 × 100

25n  =  1,600

25n÷25  =  1,600 ÷ 25

n  =  64


64% of the class are men.

Donovan took a math test and got 40 correct and 10 incorrect answers. What was the percentage of correct answers?

Proportions can be used to solve percent problems.

part
_____
whole
 = 
percent
______
100

Find what percentage 10 is of 40. The part is 10. The whole is 40.

Let n represent the percent.

Write a proportion and find the cross products to solve for n.

 = 

40n  =  10 × 100

40n  =  1,000

40n÷40  =  1,000 ÷ 40

n  =  25


The percentage of correct answers is 25%.

Georgie has a bushel basket of apples to sell at her fruit stand. 32 out of every 87 can not be sold because they are not ripe yet. What percent of her apples are not ripe?
%

Round to the nearest thousands.