Answers

Add 40/28 and 84/81

1^st number: 1 12/28, 2^nd number: 1 3/81

40/28 + 84/81 is 466/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   40/28 = 40 × 81/28 × 81 = 3240/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   84/81 = 84 × 28/81 × 28 = 2352/2268
4. Add the two like fractions:
   3240/2268 + 2352/2268 = 3240 + 2352/2268 = 5592/2268
5. 5592/2268 simplified gives 466/189
6. So, 40/28 + 84/81 = 466/189
   In mixed form: 288/189

MathStep (Works offline)

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

Related: ⁸⁰/₂₈+⁸⁴/₈₁ ⁴⁰/₅₆+⁸⁴/₈₁ ⁴⁰/₈₄+⁸⁴/₈₁

Add Fractions Calculator