Percentage Calculator

Calculate percentages: find %, of, or change.

Choose a Mode

Select calculation type below

Percentage (X)

Number (Y)

Part (X)

Total (Y)

Original Value

New Value

Enter your values above to see the result.

Result

Increase Decrease No Change

Visual Representation

Step-by-step Solution

Formulas

Mode 1: X% of Y

Result = Y × X / 100

Mode 2: X is ?% of Y

Result = (X / Y) × 100

Mode 3: % Change

Change = ((New − Old) / |Old|) × 100

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Pro Tips

Quick trick: To find 10% of any number, just move the decimal point one place to the left.

To find 25%, divide by 4. To find 50%, divide by 2. To find 75%, find 50% + 25%.

Percentage change is always relative to the original value, not the new value.

Use the quick presets in Mode 1 for common percentages like tips and discounts.