Answers

Add 56/42 and 21/12

1^st number: 1 14/42, 2^nd number: 1 9/12

56/42 + 21/12 is 37/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 12 is 84
2. For the 1st fraction, since 42 × 2 = 84,
   56/42 = 56 × 2/42 × 2 = 112/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   21/12 = 21 × 7/12 × 7 = 147/84
4. Add the two fractions:
   112/84 + 147/84 = 112 + 147/84 = 259/84
5. 259/84 simplified gives 37/12
6. So, 56/42 + 21/12 = 37/12
   In mixed form: 31/12

MathStep (Works offline)

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

Related: ⁵⁶/₄₂+⁴²/₁₂ ⁵⁶/₈₄+²¹/₁₂ ⁵⁶/₄₂+²¹/₂₄ ⁵⁶/₄₂+⁶³/₁₂ ⁵⁶/₄₂+²¹/₃₆ ⁵⁶/₄₂+²¹/₆₀ ⁵⁶/₄₂+²¹/₈₄

Add Fractions Calculator