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# Finding ten percent of an amount
- URL: https://www.esheets.io/finding-ten-percent-of-an-amount/
- Published: 2025-04-04T18:55:38.000Z
- Updated: 2026-06-21T16:42:09.000Z
- Author: Richard Linnington
- Tags: Maths, Number

Finding 10% of an amount is a quick and useful skill that comes in handy in everyday life—like when you're working out a tip in a restaurant, spotting a discount in a sale, or checking how much battery is left on your phone. It’s all about breaking things down into tenths, and it's easier than you might think! [Jump to the questions](#practise-now)

## Practise now

Worksheet preview and key skills 

### Worksheet preview

Practise finding ten percent of an amount with this self-marking maths worksheet.

The interactive worksheet below generates questions, gives instant feedback, and lets students record their score.

#### What you’ll practise

- Understanding that 10% means one tenth.
- Dividing the amount by 10.
- Using place value or decimal movement carefully.
- Writing the answer accurately.

Use the interactive worksheet below, or read the [Topic guide](#topic-guide) for the method and worked example.

## Topic guide

### What this worksheet practises

This worksheet provides practice on calculating exactly 10% of a given amount. This is the most foundational percentage skill. Because our entire number system is based on powers of 10, finding 10% is uniquely simple and serves as the primary building block for almost all other mental percentage calculations.

### Key method

To find 10% of any number, you simply divide that number by 10.

- Identify the starting amount.
- Imagine the decimal point at the end of the number (if it isn't already visible).
- Move the decimal point exactly one place to the left.
- If there are empty spaces, fill them with zeroes (though usually, you are just removing a zero from the end).

### Worked example

**Find 10% of £450.**

Step 1: The starting amount is 450.

Step 2: We must divide by 10\. We can imagine the decimal point at the end: 450.0

Step 3: Move the decimal point one place to the left.

The number becomes 45.0

10% of £450 is £45.

### Common mistakes to avoid

The most common mistake is confusing finding 10% with finding a tenth of a percent, or randomly moving the decimal point two places instead of one. Some students try to multiply by 0.1, which is mathematically correct but prone to error without a calculator. Always stick to dividing by 10.

### Things to remember

Once you know how to find 10%, you can find almost anything else mentally. Want 20%? Double your 10% answer. Want 5%? Halve your 10% answer. Want 1%? Divide your 10% answer by 10 again.