Age calculator
Find an exact age in years, months and days.
Percentage calculator
Work out a percentage of a number, a percent change, or add and subtract a percentage.
15% of 24036
Formula 15 / 100 x 240
How it works
- 1Pick the question you want answered.
- 2Type X and Y.
- 3Read the answer and the formula shown under it.
- 4Change a number to try another case.
What the options do
- What is X% of Y?
- Finds a share of a number. 15% of 240 is 36.
- X is what percent of Y?
- Turns a part and a whole into a percentage. 36 of 240 is 15%.
- Percentage change from X to Y
- Shows how much a value rose or fell compared with where it started.
- Add or subtract X% from Y
- Gives the new amount after a markup or a reduction.
Privacy
The numbers you enter are used in your browser only and are never sent to a server.
Questions people ask
How do I calculate a percentage increase?
Subtract the old value from the new one, divide by the old value and multiply by 100. From 50 to 75 that is 25 divided by 50, which is 50%.
Why is a 50% rise followed by a 50% fall not back to the start?
The second percentage applies to a larger number. 100 up 50% is 150, and 150 down 50% is 75, so you end 25% below where you began.
What is the difference between percent and percentage points?
If a rate moves from 4% to 5%, it rose by one percentage point, which is a 25% increase in the rate itself.
Why does percentage change say the start cannot be zero?
Dividing by zero is undefined. There is no meaningful percent change from nothing.
How many decimals are shown?
Up to six, with trailing zeros removed.