# Decimal

Alternatively called **base-10** and **denary**, **decimal** is a numbering system comprised of the numerals 0 to 9 that was first used by the Chinese in 1350 B.C.

Decimal numbers can be placed in a decimal place value chart to represent a value. For example, you could use the following decimal chart to get the number 593.

Thousands | Hundreds | Tens | Ones |
---|---|---|---|

0 | 5 | 9 | 3 |

In the above chart there are "5" one hundreds (500), "9" tens (90), and "3" ones to get the decimal number 593.

## Decimal fractions

A decimal fraction is a fraction with a denominator of a power of ten, determined by the number of digits to the right of the **decimal point** or **decimal separator**. For example, 2/10, 2/100, and 2/1000 are expressed in decimal as 0.2, 0.02, and 0.002. Decimal fractions can be used in a calculator or spreadsheet to calculate values.