Question 1

What exactly is a percentage?

Accepted Answer

A percentage is a fraction of 100. Writing 50% is the same as saying “50 out of 100”, or simply one half. It is a quick way to express proportions, discounts, tax rates, exam scores — any ratio you want to compare on a common scale.

Question 2

How do I find X% of a number?

Accepted Answer

Divide the percentage by 100, then multiply by the number. For example, 15% of 200 → (15 ÷ 100) × 200 = 30.

Question 3

How do I calculate percentage change?

Accepted Answer

Subtract the old value from the new one, divide by the old value, and multiply by 100. A positive result means increase; negative means decrease.

Question 4

Can percentages exceed 100%?

Accepted Answer

Absolutely. A 200% increase means the value tripled. If your investment went from $50 to $150, that is a 200% rise.

Question 5

Is this useful for tax or tip calculations?

Accepted Answer

Yes. Enter the subtotal and the tax (or tip) percentage in Basic mode to get the exact amount to add. It works for VAT, sales tax, tips, or any flat-rate markup.

Question 6

How do I find the original number from a percentage?

Accepted Answer

Use the Find Number tab. If you know that 20% of some number equals 50, the calculator divides 50 by 0.20 to get 250. The formula is: original = result × 100 ÷ percentage.

Percentage Calculator

Features

Four calculation modes

Instant results with formula

How to use

Worked examples

25% of 80

15 is what % of 60?

Increase from 50 to 75

Decrease from 80 to 60

20% of what number is 50?

Frequently asked questions

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