Answers

Add 81/42 and 2/40

1^st number: 1 39/42, 2^nd number: 2/40

81/42 + 2/40 is 277/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   81/42 = 81 × 20/42 × 20 = 1620/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   2/40 = 2 × 21/40 × 21 = 42/840
4. Add the two like fractions:
   1620/840 + 42/840 = 1620 + 42/840 = 1662/840
5. 1662/840 simplified gives 277/140
6. So, 81/42 + 2/40 = 277/140
   In mixed form: 1137/140

MathStep (Works offline)

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

Related: ⁸¹/₄₂+⁴/₄₀ ⁸¹/₈₄+²/₄₀ ⁸¹/₄₂+²/₈₀ ⁸¹/₄₂+⁶/₄₀ ⁸¹/₄₂+¹⁰/₄₀ ⁸¹/₄₂+¹⁴/₄₀

Add Fractions Calculator