Answers

Add 1/63 and 81/42

1^st number: 1/63, 2^nd number: 1 39/42

1/63 + 81/42 is 35/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   1/63 = 1 × 2/63 × 2 = 2/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   81/42 = 81 × 3/42 × 3 = 243/126
4. Add the two like fractions:
   2/126 + 243/126 = 2 + 243/126 = 245/126
5. 245/126 simplified gives 35/18
6. So, 1/63 + 81/42 = 35/18
   In mixed form: 117/18

MathStep (Works offline)

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

Related: ²/₆₃+⁸¹/₄₂ ¹/₆₃+⁸¹/₈₄ ³/₆₃+⁸¹/₄₂ ⁵/₆₃+⁸¹/₄₂ ⁷/₆₃+⁸¹/₄₂

Add Fractions Calculator