Reviewed by Laila A. Lico
What is 90% of 20?
Answer: 90% of 20 is 18
Finding the percentage of a number is a common mathematical operation used to determine part of a whole based on a given percentage. In this case, we're asked to find what 90% of 20 is, which means calculating 90 percent of the number 20.
Methods
Math Tutor Explanation Using Multiplication Method
One effective way to find a percentage of a number is by multiplying the number by the percentage expressed as a decimal.
Step 1: Step 1: Convert 90% into its decimal form by dividing by 100
Step 2: Step 2: Multiply the resulting decimal (0.9) by 20
Math Tutor Explanation Using Fraction Method
Percentages can also be understood as fractions, allowing another method to find the desired value.
Step 1: Step 1: Express 90% as the fraction 90/100, which simplifies to 9/10
Step 2: Step 2: Multiply 20 by 9/10 to get the result
Step 1:
Step 2:
Math Tutor suggests: Practice More Percentage Problems
Keep improving your skills with more exercises on calculating percentages of different numbers.
FAQ on Finding Percentages
How do you convert a percentage into a decimal?
Divide the percentage value by 100 to convert it into a decimal.
Can you find any percentage of any number using these methods?
Yes, you can use these methods for any percentage and any number.
Why is it useful to know how to find a percentage of a number?
It's useful in everyday life, such as calculating discounts, taxes, and statistics.
What is 10% of 20?
10% of 20 is 2.
Is 90% of 20 greater than half of 20?
Yes, 90% of 20 is 18, which is greater than 10, half of 20.
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