% Percentage Calculator

Working with Percentages

Percentages express a number as a fraction of 100, and they appear everywhere — discounts, interest, marks, tax, tips and growth rates. This tool handles the common percentage questions people face day to day, without any manual arithmetic.

The basic relationships are simple: X% of Y = (X ÷ 100) × Y; and to find what percentage X is of Y, use (X ÷ Y) × 100. To find a percentage increase or decrease between two numbers, use ((new − old) ÷ old) × 100.

For example, 15% of ₹2,000 is ₹300; a score of 72 out of 90 is 80%; and a price rising from ₹500 to ₹650 is a 30% increase. Whether you are calculating a shop discount or an exam percentage, this tool gives an instant, accurate answer.

Key points to remember

• "X% of Y" means (X ÷ 100) × Y.
• Percentage change = (new − old) ÷ old × 100.
• To reverse a discount, divide by (1 − discount%).

Frequently asked questions

Subtract the old value from the new value, divide by the old value, and multiply by 100.

Divide the part by the whole and multiply by 100.