Reviewed by Franz Jerby Delos Santos
What is 20% of 40?
Answer: 20% of 40 is 8
Finding a percentage of a number is a fundamental math skill used in everyday life, such as calculating discounts, tips, or parts of a total. Here, we are determining what 20% of the number 40 equals.
Methods
Math Tutor Explanation Using the Multiplication Method
This common method involves converting the percentage to a decimal and multiplying it by the number.
Step 1: Step 1: Convert 20% to a decimal by dividing by 100 (20 ÷ 100 = 0.2)
Step 2: Step 2: Multiply 0.2 by 40 (0.2 × 40 = 8)
Math Tutor Explanation Using Fraction Method
Percentages can be easily converted to fractions, making the calculation straightforward.
Step 1: Step 1: Express 20% as a fraction (20/100 = 1/5)
Step 2: Step 2: Multiply the fraction by 40 (1/5 × 40 = 8)
Step 1:
Step 2:
Math Tutor suggests: More Practice with Percentages
Explore more problems involving percentages to strengthen your understanding of percentage calculations.
FAQ on Calculating Percentages
How do you convert a percentage to a decimal?
Divide the percentage by 100 to get its decimal form.
Why do we multiply after converting to decimal or fraction?
Multiplying gives us the specified portion of the original number.
What is a quick way to estimate 20% of a number?
Find 10% by dividing by 10, then double that amount for 20%.
Where are percentage calculations used?
They are used in finance, shopping discounts, grades, statistics, and many daily scenarios.
Math & reading from 1st to 9th grade
Looking for homework support for your child?
Choose kid's grade
