The following section reviews the processes of renaming and simplifying fractions. These processes are invaluable when you add, subtract, multiply, or divide fractions.

#### Equivalent fractions

Fractions that name the same number, such as 1/2, 2/4, 3/6, 4/8, and 5/10, are called equivalent fractions. A simple method to check if fractions are equivalent is to cross multiply and check the products.

##### Example 1

Is equivalent to ?

The cross products are the same, so the fractions and are equivalent.

##### Example 2

Is equivalent to ?

The cross products are not the same, so the fractions and are not equivalent.

#### Simplifying fractions

When given as a final answer, a fraction should be simplified to lowest terms. **Simplifying** fractions is done by dividing both the numerator and denominator by the largest integer that will divide evenly into both.

##### Example 3

Simplify to lowest terms.

To simplify to lowest terms, divide the numerator and denominator by 5.

Since cannot be simplified any further, that is, the numerator and denominator cannot both be evenly divided again, is simplified to lowest terms.

##### Example 4

Simplify to lowest terms.

#### Enlarging denominators

The **denominator** of a fraction may be enlarged and the fraction keeps its original value by multiplying both the numerator and denominator by the same number.

##### Example 5

Change to eighths.

To change to eighths, simply multiply the numerator and denominator by 2.

##### Example 6

Express as tenths.