Answers

Add 70/72 and 56/21

1^st number: 70/72, 2^nd number: 2 14/21

70/72 + 56/21 is 131/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   70/72 = 70 × 7/72 × 7 = 490/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   56/21 = 56 × 24/21 × 24 = 1344/504
4. Add the two like fractions:
   490/504 + 1344/504 = 490 + 1344/504 = 1834/504
5. 1834/504 simplified gives 131/36
6. So, 70/72 + 56/21 = 131/36
   In mixed form: 323/36

MathStep (Works offline)

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

Related: ⁷⁰/₇₂+⁵⁶/₄₂ ⁷⁰/₇₂+⁵⁶/₆₃

Add Fractions Calculator