Percentage Calculator — Percent of, What Percent & % Change

Calculate percent of a number, what percent one number is of another, and percentage change.

1) What is X% of Y?

X (%)

Result

—

X% of Y

Percent

—

X ÷ Y × 100

Old value

New value

Change

—

Increase or decrease (%)

Difference

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New − Old

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Formulas: X% of Y = (X ÷ 100) × Y · X is what % of Y = (X ÷ Y) × 100 · % Change = ((New − Old) ÷ Old) × 100