Answers

Add 30/72 and 25/81

30/72 + 25/81 is 235/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 81 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 72 × 9 = 648,
   30/72 = 30 × 9/72 × 9 = 270/648
3. Likewise, for the 2nd fraction, since 81 × 8 = 648,
   25/81 = 25 × 8/81 × 8 = 200/648
4. Add the two like fractions:
   270/648 + 200/648 = 270 + 200/648 = 470/648
5. 470/648 simplified gives 235/324
6. So, 30/72 + 25/81 = 235/324

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁶⁰/₇₂+²⁵/₈₁ ³⁰/₇₂+⁵⁰/₈₁ ⁹⁰/₇₂+²⁵/₈₁ ³⁰/₇₂+⁷⁵/₈₁

Add Fractions Calculator