Question 1

How do you calculate a percentage?

Accepted Answer

A percentage is a ratio out of 100. For example, 10% of 200 is 200 × 10 ÷ 100 = 20.

Question 2

How do you calculate percentage change?

Accepted Answer

Percentage change = (New value - Old value) ÷ |Old value| × 100. For example, from 80 to 100 is (100-80)÷80×100 = 25% increase.

Question 3

Can I use this for discount calculations?

Accepted Answer

Yes! Use the first calculator to enter the discount rate and original price to instantly see the discount amount. For example, 30% of $50 = $15 off.

Question 4

Are decimal results accurate?

Accepted Answer

Yes, results are displayed with up to 10 decimal places of precision. All calculations happen in real-time in your browser.

Question 5

Is my data sent to a server?

Accepted Answer

No, all calculations happen entirely in your browser. There is no server communication whatsoever.

Percentage Calculator

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