How to use this tool
- Pick the question that matches yours.
- Type the two numbers.
- The answer shows next to the equals sign.
About this tool
The three formulas are: X% of Y = X / 100 × Y; X is what percent of Y = X / Y × 100; and percentage change = (new − old) / old × 100.
A common mistake is mixing up the base. A price that rises from 80 to 100 has gone up by 25%, but a price that falls from 100 to 80 has gone down by 20%, because the change is measured against the starting number each time.
Percentage kaise nikale? Teen calculators me se apna sawal chuno aur numbers daalo, jawab turant dikhega.
Frequently asked questions
How do I calculate a discount?
Use the first calculator: 20% of 1500 gives the discount amount. Subtract it from the price to get the final price.
Why is the increase 25% but the decrease 20%?
Percentage change is always measured against the starting value. Going from 80 to 100 is +20 on a base of 80 (25%), while 100 to 80 is -20 on a base of 100 (20%).
Can I use decimals or negative numbers?
Yes, decimals work. For percentage change the starting number cannot be zero.