Answers

Add 81/35 and 2/21

1^st number: 2 11/35, 2^nd number: 2/21

81/35 + 2/21 is 253/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 35 × 3 = 105,
   81/35 = 81 × 3/35 × 3 = 243/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   2/21 = 2 × 5/21 × 5 = 10/105
4. Add the two like fractions:
   243/105 + 10/105 = 243 + 10/105 = 253/105
5. So, 81/35 + 2/21 = 253/105
   In mixed form: 243/105

MathStep (Works offline)

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

Related: ⁸¹/₃₅+⁴/₂₁ ⁸¹/₇₀+²/₂₁ ⁸¹/₃₅+²/₄₂ ⁸¹/₃₅+⁶/₂₁ ⁸¹/₃₅+²/₆₃ ⁸¹/₃₅+¹⁰/₂₁ ⁸¹/₃₅+¹⁴/₂₁

Add Fractions Calculator