**Subtracting Fractions with Unlike Denominators:**

Remember that given a fraction, such as _{}, the top number is the numerator (namely 1) and the bottom
number is the denominator (namely 2)

Example 1:

_{}

Whenever you subtract fractions with *unlike*
denominators, you need to make the **denominators** equal to each other by
finding the least common denominator.
In this example, you need to multiply_{}by 4 to get _{}. Next, you need to
multiply the second equation _{} by 5 to get _{}. Notice that both
fractions have 20 as a common denominator.
Subtract in the same manner as with the unit Subtracting fractions with like
denominators.

_{}

Example 2:

_{}_{}

Whenever you subtract fractions with *unlike*
denominators, you need to make the **denominators** equal to each other by
finding the least common denominator.
In this example, first find a common denominator. Here, you multiply _{} by _{} to get _{}. Then you multiply
the second fraction _{}by _{} to get _{}. Note that both
fractions have 24 as a denominator.
Subtract in the same manner as with the unit Subtracting fractions with like
denominators.

_{}

Try this problem:

#### When you are
ready, click here to go to the subtraction of fractions
with unlike denominators practice page. You may need some scratch paper to
do the practice.