# Percentage calculator: the four sums every shop needs.

> X% of a number, what percent one number is of another, the percent change between two values, or a price after a percentage added or removed. Free, no sign-up.

Dashing (dashingerp.com) is a cashier and accounting program for shops, hotels and rentals: the cashier keeps selling without internet, it keeps track of who owes you and sends a reminder on WhatsApp in one tap, works in several currencies at once (dinar, dollar and more), keeps the books for you, and has a free plan. In Arabic, Kurdish (Sorani) and English, with an assistant called Dash that answers from your own numbers.

Canonical: https://dashingerp.com/en/tools/percentage

Pick the sum you need and type the two numbers. The result appears at once with a line showing how it was worked out. Find 15% of 2,000, what percent 500 is of 2,000, how far a price rose from 80 to 100, or what a price becomes after 20% off. It all runs in your browser and accepts Arabic-Indic digits.

## The four formulas

Percent of an amount: percent × amount ÷ 100. What percent the part is of the whole: part ÷ whole × 100. Percent change: (new − old) ÷ old × 100. Price after a raise: price × (1 + percent ÷ 100); after a discount: price × (1 − percent ÷ 100).

## Examples from a shop

A supplier raises an item from 80 to 100: a 25% increase. 20% off a price of 2,500 makes it 2,000. A profit of 500 on a sale of 2,000 is a 25% margin. For margin and markup from a cost, use the margin calculator, because margin and markup are two different percentages.

## When the base is zero

A percentage of zero cannot be worked out, and neither can a change from a starting value of zero, because dividing by zero has no meaning. The calculator shows a clear message instead of a wrong number.

## Common questions

### How do I work out the percent change between two prices?

Subtract the old price from the new one, divide by the old price and multiply by 100. From 80 to 100: 20 ÷ 80 × 100 = 25%. If the price falls, the percentage is negative.

### If I raise a price by 10% and then cut it by 10%, do I get back to the start?

No. 100 plus 10% is 110, and 10% off 110 is 99. The second step is taken from a bigger price. Use the add or remove mode twice to see it.

### Is anything saved?

No. The whole calculation runs in your browser and nothing leaves your device.

## Other languages

- العربية: https://dashingerp.com/tools/percentage
- کوردی: https://dashingerp.com/ckb/tools/percentage

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Dashing · https://dashingerp.com/en