Percentage Calculator

Everyday percentages without the guesswork

Percentages turn up everywhere: discounts, marks, salary hikes, interest rates, tips, tax and price changes. Most mistakes come from using the wrong base. If a price rises from ₹800 to ₹1,000, the increase is 25%, because the change of ₹200 is measured against the original ₹800. If it then falls back from ₹1,000 to ₹800, the fall is only 20%, because the base is now ₹1,000. The same ₹200 gives two different percentages depending on where you start.

Enter two values and the calculator answers the common questions together, so you can pick the line you need without choosing a formula. It shows what percentage the first number is of the second, which is handy for marks or budget shares. It also treats the first number as a rate and applies it to the second, such as 18% of ₹2,500, and the percentage change from one to the other, whether that is a pay rise, a stock price move or a change in your electricity bill.

A few habits make percentages easier in daily life. To find 10%, move the decimal point one place left, then double or halve it for 20% or 5%. Successive discounts do not simply add up: 20% off followed by another 10% off is a total discount of 28%, not 30%. Likewise, a 50% loss needs a 100% gain to recover, which is worth remembering for investments. When comparing offers, convert everything into rupees as well as percentages, since a large percentage of a small amount can matter less than a small percentage of a large one.