Reviewed by Mary Grace Carlos
What is 15% of 20?
Answer: 15% of 20 is 3
Calculating percentages is a common math skill used to find a certain part of a whole. In this case, you are looking to find what 15% of 20 is. This involves multiplying 20 by 15%, which can also be written as 0.15.
Methods
Math Tutor Explanation Using the Percentage Formula
You can determine what 15% of 20 is by converting the percent to a decimal and then multiplying.
Step 1: Step 1: Convert 15% to a decimal by dividing by 100 (15 ÷ 100 = 0.15)
Step 2: Step 2: Multiply 0.15 by 20 (0.15 × 20 = 3)
Math Tutor Explanation Using Proportions
Percentages can also be solved using proporitons, by setting up a fraction where the part over the whole equals the percent over 100.
Step 1: Step 1: Set up the equation as x/20 = 15/100
Step 2: Step 2: Solve for x by multiplying both sides by 20 (x = (15/100) × 20 = 3)
Step 1:
Step 2:
Math Tutor suggests: Practice More Percentage Calculations
Boost your skills with more questions on finding percentages of numbers and related topics.
FAQ on Calculating Percentages
How do you turn a percentage into a decimal?
Divide the percentage by 100; for example, 15% becomes 0.15.
What does 'of' mean in percentage problems?
Of' means you should multiply; for instance, 15% of 20 means 0.15 × 20.
Can percentages be greater than 100%?
Yes, percentages can be greater than 100% when the part is greater than the whole.
Why is multiplying by a percentage useful?
It helps quickly determine parts of a whole in real-life situations like sales, discounts, and statistics.
Math & reading from 1st to 9th grade
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