01 · Arithmetic
Percentage Calculator
Three common percentage problems, solved in one panel: what a percentage of a number is, how much something changed by, and what the original value was.
Result
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Enter a percentage and a number
Percent change
How much a value increased or decreased, as a percentage.
Change
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Enter both values
Find the original value
If a number is a known percentage of something, work out what that something was.
Original value
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Enter both values