Answers

Add 7/81 and 18/42

7/81 + 18/42 is 292/567.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 42 is 1134
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1134
2. For the 1st fraction, since 81 × 14 = 1134,
   7/81 = 7 × 14/81 × 14 = 98/1134
3. Likewise, for the 2nd fraction, since 42 × 27 = 1134,
   18/42 = 18 × 27/42 × 27 = 486/1134
4. Add the two like fractions:
   98/1134 + 486/1134 = 98 + 486/1134 = 584/1134
5. 584/1134 simplified gives 292/567
6. So, 7/81 + 18/42 = 292/567

MathStep (Works offline)

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

Related: ¹⁴/₈₁+¹⁸/₄₂ ⁷/₈₁+³⁶/₄₂ ⁷/₈₁+¹⁸/₈₄ ²¹/₈₁+¹⁸/₄₂ ⁷/₈₁+⁵⁴/₄₂ ³⁵/₈₁+¹⁸/₄₂ ⁷/₈₁+⁹⁰/₄₂ ⁴⁹/₈₁+¹⁸/₄₂

Add Fractions Calculator