The three percentage questions
X% of Y multiplies: 20% of 1500 is 0.20 × 1500 = 300. X is what % of Y divides: 45 out of 60 is 45 ÷ 60 × 100 = 75%. Percentage change compares two values: going from 200 to 250 is a +25% increase. Fill any one row and the answer appears below.
Where you'll use it
Percentages are everywhere — working out a discount or a tip, checking an exam score, seeing how much a price rose, calculating interest, or splitting a bill by share. This calculator keeps all three common forms on one screen so you never have to remember the formula.
Frequently asked questions
How do I calculate a percentage increase?
Use the third row: enter the starting number under "From X" and the new number under "To Y". A positive result is an increase, a negative one is a decrease.
What is 15% of 2000?
Enter 15 and 2000 in the first row — the answer is 300.
Are the results rounded?
Results show up to four decimal places, so you get a precise figure you can round yourself.
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