Percentage Calculator
Four questions people actually ask. All update live.
What is X% of Y?
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X is what percent of Y?
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Percentage change
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Tip & split
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The one people get wrong
A 50% rise followed by a 50% fall does not return you to where you started. Start at 100, rise to 150, then lose 50% of 150 — you end at 75. Percentage changes compound against the running total, not the original. The "percentage change" box above always measures against the From value.