How do I calculate percentage increase?

Percentage increase = ((New Value − Original Value) ÷ Original Value) × 100

Can I use this calculator for discounts or taxes?

Yes, use increase/decrease functions to calculate discounts, price increases, or tax changes.

Percentage Calculator – % of Value, Increase/Decrease, Part of Whole

Quickly calculate the percentage of a value, percentage increase or decrease, what percent a part is of a whole, or percentage change. Ideal for students, finance, shopping, and everyday math problems.

⚠️ Tip: Use this calculator for fast and accurate percentage calculations in education, business, finance, and shopping.

Value / Original Number

Percentage (%)

Additional Calculations

Part Enter part value

Whole Enter whole value

Percentage Formulas & Examples

% of Value

Result = (Percentage ÷ 100) × Value

Example: 20% of 150 = 30

Increase by %

New Value = Original × (1 + % ÷ 100)

Example: 150 + 20% = 180

Decrease by %

New Value = Original × (1 − % ÷ 100)

Example: 150 − 20% = 120

What % is Part of Whole

Percentage = (Part ÷ Whole) × 100

Example: 30 is what % of 150 = 20%

% Change

% Change = ((New − Original) ÷ Original) × 100

Example: From 100 to 150 → 50% increase