Percentage Calculator

Three everyday percentage problems — discounts, shares, and changes — solved with the formula shown.

Percentages run daily life in Pakistan: the 17% sales tax added to your bill, the discount on a daraz.pk sale, your child's exam percentage, the markup on shop inventory, or the raise your employer just announced. Despite using them constantly, most people fumble the actual calculation — is a 20% discount on Rs. 1,500 really Rs. 300 off? What percentage of the total did you actually score?

NexToolz's free percentage calculator handles the three percentage questions everyone asks. "What is X% of Y?" covers discounts, taxes, tips, and commissions. "X is what percent of Y?" answers exam scores, budget shares, and profit margins. "Percentage change from X to Y" tells you whether your savings grew or your expenses rose, with the increase or decrease clearly labelled. Each mode shows the exact formula used, so you learn the method while getting the answer.

The tool validates every input and handles edge cases like division by zero gracefully. Everything runs locally in your browser — no signup, no ads in your face, and results in a fraction of a second. Shopkeepers in Saddar and students in board exams alike can rely on it for quick, trustworthy answers.

How to use

  1. Pick the modeChoose the percentage question you need answered from the dropdown.
  2. Enter the numbersFill in X and Y — discounts, marks, prices, anything.
  3. CalculatePress the button to get the answer with the formula shown.
  4. Reuse instantlySwitch modes any time; each mode keeps its own inputs.

Frequently asked questions

How do I calculate a discount percentage?
Use "What is X% of Y?" — enter the discount percent as X and the original price as Y. Subtract the result from the price to get what you pay.
How do I find an exam percentage?
Use "X is what % of Y?" — enter your obtained marks as X and the total marks as Y. That is exactly how board and university percentages are computed in Pakistan.
What does a negative percentage change mean?
A negative result means a decrease. For example, going from 1,000 to 800 is a −20% change — a 20% decrease.
Can I use decimal numbers?
Yes. All fields accept decimals, so values like 17.5% sales tax or Rs. 2,499.99 work fine.
Why does it say the whole cannot be zero?
Division by zero is mathematically undefined. "X is what % of Y" needs a non-zero Y, and percentage change needs a non-zero starting value X.

Why use this tool?

Percentages hide inside marks sheets, discounts, tax, tips and exam results, and each question is phrased differently. This tool separates the three common cases — finding a percentage of a number, finding what percent one number is of another, and percentage change — so you get the right formula without guessing.