Answers

Add 28/49 and 70/81

28/49 + 70/81 is 814/567.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 81 is 3969
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3969
2. For the 1st fraction, since 49 × 81 = 3969,
   28/49 = 28 × 81/49 × 81 = 2268/3969
3. Likewise, for the 2nd fraction, since 81 × 49 = 3969,
   70/81 = 70 × 49/81 × 49 = 3430/3969
4. Add the two like fractions:
   2268/3969 + 3430/3969 = 2268 + 3430/3969 = 5698/3969
5. 5698/3969 simplified gives 814/567
6. So, 28/49 + 70/81 = 814/567
   In mixed form: 1247/567

MathStep (Works offline)

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

Related: ⁵⁶/₄₉+⁷⁰/₈₁ ²⁸/₉₈+⁷⁰/₈₁ ⁸⁴/₄₉+⁷⁰/₈₁

Add Fractions Calculator