Answers

Add 72/54 and 2/21

1^st number: 1 18/54, 2^nd number: 2/21

72/54 + 2/21 is 10/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 21 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   72/54 = 72 × 7/54 × 7 = 504/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   2/21 = 2 × 18/21 × 18 = 36/378
4. Add the two like fractions:
   504/378 + 36/378 = 504 + 36/378 = 540/378
5. 540/378 simplified gives 10/7
6. So, 72/54 + 2/21 = 10/7
   In mixed form: 13/7

MathStep (Works offline)

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

Related: ⁷²/₅₄+⁴/₂₁ ⁷²/₅₄+²/₄₂ ⁷²/₅₄+⁶/₂₁ ⁷²/₅₄+²/₆₃ ⁷²/₅₄+¹⁰/₂₁ ⁷²/₅₄+¹⁴/₂₁

Add Fractions Calculator