# Types of Decimal Numbers

### Exact Decimal

The decimal part of an exact decimal number is composed of a finite number of digits.

### Repeating Decimal or Recurring Decimal

#### 1

**The decimal part, called the period, is repeated endlessly. **

#### 2

**The decimal part is composed of an irregular part and a regular part, also known as a period. **

### Not Exact and Non-Recurrent

Given a fraction, its** decimal number** can be calculated by taking the denominator and** decomposing it into factors. **

If the denominator has a factor of only 2, or only 5, or 5 and 2; the fraction is decimal exact.

If the denominator does not have a factor of 2 or 5, the fraction is a repeating decimal of the first type.

If the denominator has factors other than 2 or 5, the fraction is a repeating decimal of the second type.