How To Add Fractions With Unlike Denominator

How to add fractions with unlike denominator

 

How to add fractions with unlike denominators:

I am gonna give a example, a example to know how to add fractions with unlike denominators.

Example:

2/7 + 1/3 =

Step Number 1: Find the least common denominator (LCD) of the fractions.

If did not know what LCD means, here is the meaning:

LCD, also called as least common denominator, like the least common multiple, is two or more numbers is the smallest numbers that can be divided exactly by the given number.

*BACK TO ANSWERING*

The LCD of 7 and 3 is 21.

Step 2: Use the LCD to find fractions that are equivalent to the given fractions

Use the LCD to form equivalent fractions.

Formula: fraction x other fraction denominator

2/7 x 3 = 6/21         1/3 x 7 = 7/21

Step 3: Apply the steps in adding similar fractions

6/21                   +        7/21         = n -- means number

Solve 6/21 + 7/21

Rule: these are already similar fractions. its easy to add up but do not add the denominators.

*back to answering*

6 + 7 = 13

then only copy the denominator of the question of similar fractions

so, the answer is:

n =  13/21

Answer: Therefore, the sum of 2/7 and 1/3 is 13/21.

hope it helps :)

O