Answers

Add 84/18 and 70/81

1^st number: 4 12/18, 2^nd number: 70/81

84/18 + 70/81 is 448/81.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 81 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 18 × 9 = 162,
   84/18 = 84 × 9/18 × 9 = 756/162
3. Likewise, for the 2nd fraction, since 81 × 2 = 162,
   70/81 = 70 × 2/81 × 2 = 140/162
4. Add the two like fractions:
   756/162 + 140/162 = 756 + 140/162 = 896/162
5. 896/162 simplified gives 448/81
6. So, 84/18 + 70/81 = 448/81
   In mixed form: 543/81

MathStep (Works offline)

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

Related: ⁸⁴/₃₆+⁷⁰/₈₁ ⁸⁴/₅₄+⁷⁰/₈₁ ⁸⁴/₉₀+⁷⁰/₈₁

Add Fractions Calculator