Answers

Add 2/21 and 63/42

1^st number: 2/21, 2^nd number: 1 21/42

2/21 + 63/42 is 67/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 42 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   2/21 = 2 × 2/21 × 2 = 4/42
3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
   63/42 = 63 × 1/42 × 1 = 63/42
4. Add the two like fractions:
   4/42 + 63/42 = 4 + 63/42 = 67/42
5. So, 2/21 + 63/42 = 67/42
   In mixed form: 125/42

MathStep (Works offline)

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

Related: ⁴/₂₁+⁶³/₄₂ ²/₄₂+⁶³/₄₂ ²/₂₁+⁶³/₈₄ ⁶/₂₁+⁶³/₄₂ ²/₆₃+⁶³/₄₂ ¹⁰/₂₁+⁶³/₄₂ ¹⁴/₂₁+⁶³/₄₂

Add Fractions Calculator