MotionShine01 / Percent of
X% of Y
Divide the percent by 100 and multiply: 15% of 80 is 0.15 × 80 = 12.
Free tool
Percentage calculator, four common questions.
Type the numbers and the answer appears as you go, with the sum shown so you can check it. What is 15% of 80? 12 is what percent of 48? What is the percent change from 50 to 65? What is 200 with 20% off, or with 8% tax added? All four are on one page.
What is
% of
is what % of
Percent change from
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The formulas
Simple sums, shown every time.
02 / What percent
X out of Y
Divide the part by the whole and multiply by 100: 12 of 48 is 25%.
03 / Change
From X to Y
Take the old from the new, divide by the old, times 100: 50 to 65 is +30%.
Questions
Good to know.
How do I calculate a percentage of a number?
Divide the percent by 100 and multiply by the number. 20% of 150 is 0.2 × 150 = 30.
How do I find what percent one number is of another?
Divide the first by the second and multiply by 100.
How do I calculate percent change?
Subtract the old value from the new one, divide by the old value, and multiply by 100.
How do I take a percent off a price?
Use the last line: 200 minus 20% is 160.
Why is a 50% rise then a 50% fall not back to the start?
The fall is 50% of the bigger number. 100 up 50% is 150; down 50% is 75.