How to calculate percentage?

Learn how to work out percentages easily with this step-by-step instructions.

Remember:1. When you say x%, it means a number with x as the numerator and 100 as the denominator i.e., x% = x/100
and2. x% of y = x/100 × y

Example: Let's find 15% of 90

15% of 90 = 15/100 × 90 = 0.15 × 90 = 13.5

Next: How to find the percentage of one number with respect to another?

e.g., What is the percentage of boys with respect to the total class strength of 60 if there are 20 boys in the class?

Finally: Let's learn how to solve percentage problems of the form "15% of what number is 300?"

Let the number be x