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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%.

A serving of ice cream contains 100 calories. 6 calories come from fat. What percent of the total calories come from fat?
%

Round to the nearest thousands.