How do I calculate percentage change?

((New Value − Old Value) ÷ Old Value) × 100. Positive = increase, negative = decrease.

What percentage is X of Y?

Divide X by Y, then multiply by 100. Example: 45 out of 180 = (45 ÷ 180) × 100 = 25%.

How do I calculate a discount?

Discount = Price × (Discount% ÷ 100). Sale price = Price − Discount.

Percentage vs percentage points?

Going from 10% to 15% is a 50% increase (relative) but 5 percentage points (absolute). This distinction matters in statistics and economics.

Where is this useful in daily life?

Shopping discounts, restaurant tips, taxes, profit margins, grade calculations, interest rates, growth metrics, election results, medical statistics, and nearly any context where part of a whole must be measured.

How do I quickly estimate 15% or 20% mentally?

For 10%, move the decimal one place left (10% of 250 = 25). For 5%, take half of 10% (12.5). For 15%, add 10% + 5% (37.5). For 20%, double 10% (50). This mental shortcut lets you estimate tips, discounts, and taxes quickly without a calculator.

Can percentages exceed 100%?

Yes. A price that triples is a 200% increase (the new value is 300% of the old). A stock that doubles is a 100% gain. Percentages above 100 are common in finance, sports statistics, and performance comparisons. Only when describing a portion of a fixed whole (like 'percent of students passing') are percentages constrained to 0–100.

Percentage Calculator

Financial

Calculate percentages for discounts, tax, tips, profit margins, and more.

Financial

Percentage Calculator

Generated on April 24, 2026

Find a percentage of a number. Example: 15% of 200 = 30.

Percentage

Number

Result

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?What is the Percentage Calculator?

A percentage calculator handles the three most common percentage operations: finding a percentage of a number, determining what percentage one number is of another, and calculating percentage increase or decrease between two values. It is essential for shopping discounts, tax calculations, financial analysis, academic grades, profit margins, tip calculations, statistical comparisons, and countless other real-world problems. Every business and consumer decision involving fractions of a whole eventually reduces to a percentage calculation, which is why mastering this operation (or having a reliable tool for it) pays off in daily life.

The Formula

X% of Y = (X ÷ 100) × Y | % change = ((New − Old) ÷ Old) × 100

Percent literally means 'per hundred'. Dividing X by 100 converts the percentage to a decimal fraction, which you then multiply by the target number. For percentage change, the denominator is always the original (starting) value.

Practical Examples

A PKR 5,000 shirt at 30% off — discount = PKR 1,500, you pay PKR 3,500.

Exam score 72 out of 90 → 72 ÷ 90 × 100 = 80%.

Price rose from $40 to $52 → percentage increase = 30%.

17% GST on a PKR 10,000 invoice = PKR 1,700 tax, total PKR 11,700.

Frequently Asked Questions

Multiply the number by X and divide by 100. Example: 15% of 200 = (200 × 15) ÷ 100 = 30.

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Percentage Calculator

?What is the Percentage Calculator?

The Formula

Practical Examples

Frequently Asked Questions

How do I find X% of a number?

How do I calculate percentage change?

What percentage is X of Y?

How do I calculate a discount?

Percentage vs percentage points?

Where is this useful in daily life?

How do I quickly estimate 15% or 20% mentally?

Can percentages exceed 100%?

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