Answers

Add 84/18 and 81/42

1^st number: 4 12/18, 2^nd number: 1 39/42

84/18 + 81/42 is 277/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   84/18 = 84 × 7/18 × 7 = 588/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   81/42 = 81 × 3/42 × 3 = 243/126
4. Add the two like fractions:
   588/126 + 243/126 = 588 + 243/126 = 831/126
5. 831/126 simplified gives 277/42
6. So, 84/18 + 81/42 = 277/42
   In mixed form: 625/42

MathStep (Works offline)

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

Related: ⁸⁴/₃₆+⁸¹/₄₂ ⁸⁴/₁₈+⁸¹/₈₄ ⁸⁴/₅₄+⁸¹/₄₂ ⁸⁴/₉₀+⁸¹/₄₂

Add Fractions Calculator