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A fraction is a form where the numbers are written in the numerator and the denominator. When two or more fractions are added or subtracted together, it is very important to have a common denominator for the fractions involved. Common denominator calculator is the fun tool which can give a common denominator to the fractions and can simplify it.

**Example 1: Add the two given two fractions, 5/2 and 4/3.**

Since we have to add ? 5/2 + 4/3

The above two fractions have different denominators, one has ‘2’ and the other has ‘3’.

We need to get a common denominator ? **LCM of ‘2’ and ‘3’ = 6**

Hence for the first fraction we get ? (5 * 3)/ (2 * 3) = 15/6

For the second fraction we get ? (4 * 2)/ (3 * 2) = 8/6

**Add the fractions ****?**** 15/ 6 + 8/6 = (15 + 8)/ 6 = 23/6**

**Example 2: Subtract the given two fractions, 3/5 and 4/7.**

Since we have to subtract ? 3/5 – 4/7

The above two fractions have different denominators, one has ‘5’ and the other has ‘7’.

We need to get a common denominator ? **LCM of ‘5’ and ‘7’ = 35**

Hence for the first fraction we get ? (3 * 7)/ (5 * 7) = 21/35

For the second fraction we get ? (4 * 5)/ (7 * 5) = 20/35

**Subtract the fractions ****?**** 21/35 – 20/35 = (21 – 20)/ 35 = 1/35**