Answers

Add 8/28 and 90/72

1^st number: 8/28, 2^nd number: 1 18/72

8/28 + 90/72 is 43/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   8/28 = 8 × 18/28 × 18 = 144/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   90/72 = 90 × 7/72 × 7 = 630/504
4. Add the two like fractions:
   144/504 + 630/504 = 144 + 630/504 = 774/504
5. 774/504 simplified gives 43/28
6. So, 8/28 + 90/72 = 43/28
   In mixed form: 115/28

MathStep (Works offline)

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

Related: ¹⁶/₂₈+⁹⁰/₇₂ ⁸/₅₆+⁹⁰/₇₂ ²⁴/₂₈+⁹⁰/₇₂ ⁸/₈₄+⁹⁰/₇₂ ⁴⁰/₂₈+⁹⁰/₇₂ ⁵⁶/₂₈+⁹⁰/₇₂

Add Fractions Calculator