Reviewed by Mary Grace Carlos
What is 70% of 20?
Answer: 70% of 20 is 14
Calculating a percentage of a number involves finding out how much that percentage represents in terms of the original value. In this case, determining 70% of 20 means finding what number equates to 70 out of every 100 parts of 20.
Methods
Math Tutor Explanation Using the Multiplication Method
You can find the percentage of a number by multiplying the number by the percentage (as a decimal).
Step 1: Step 1: Convert 70% to a decimal by dividing by 100 (70 ÷ 100 = 0.7)
Step 2: Step 2: Multiply 0.7 by 20 (0.7 × 20 = 14)
Math Tutor Explanation Using the Proportion Method
Another way to solve percentage problems is to set up a simple proportion.
Step 1: Step 1: Set up the proportion 70/100 = x/20
Step 2: Step 2: Cross-multiply to get 70 × 20 = 100 × x
Step 1:
Step 2:
Math Tutor suggests: Practice More Percentage Calculations
Strengthen your skills with these related percentage calculation exercises. They'll help you become more comfortable finding percentages of different numbers.
FAQ on Calculating Percentages
How do I convert a percentage to a decimal?
Divide the percentage by 100. For example, 70% becomes 0.7.
Can I use a calculator for percentage problems?
Yes, a calculator can help speed up calculations, especially with large or complex numbers.
What is the formula for finding a percentage of a number?
Multiply the number by the percentage (in decimal form).
What are practical uses for calculating percentages?
Percentages are used in discounts, interest rates, tips, test scores, and many other everyday situations.
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