Answers

Add 84/81 and 15/12

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

84/81 + 15/12 is 247/108.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 12 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   84/81 = 84 × 4/81 × 4 = 336/324
3. Likewise, for the 2nd fraction, since 12 × 27 = 324,
   15/12 = 15 × 27/12 × 27 = 405/324
4. Add the two like fractions:
   336/324 + 405/324 = 336 + 405/324 = 741/324
5. 741/324 simplified gives 247/108
6. So, 84/81 + 15/12 = 247/108
   In mixed form: 231/108

MathStep (Works offline)

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

Related: ⁸⁴/₈₁+³⁰/₁₂ ⁸⁴/₈₁+¹⁵/₂₄ ⁸⁴/₈₁+⁴⁵/₁₂ ⁸⁴/₈₁+¹⁵/₃₆ ⁸⁴/₈₁+⁷⁵/₁₂ ⁸⁴/₈₁+¹⁵/₆₀ ⁸⁴/₈₁+¹⁵/₈₄

Add Fractions Calculator