📊 Percentage Calculator

Three essential percentage calculations.

What is X% of Y?

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X is what % of Y?

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% Change from X to Y

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Quick Tricks

10%: move decimal left. 5%: half of 10%. 20%: double 10%. 25%: divide by 4.

% increase formula?

((New − Old) / Old) × 100. Positive = increase; negative = decrease.