Answers

Add 21/63 and 12/9

1^st number: 21/63, 2^nd number: 1 3/9

21/63 + 12/9 is 5/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 9 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 63 × 1 = 63,
   21/63 = 21 × 1/63 × 1 = 21/63
3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
   12/9 = 12 × 7/9 × 7 = 84/63
4. Add the two like fractions:
   21/63 + 84/63 = 21 + 84/63 = 105/63
5. 105/63 simplified gives 5/3
6. So, 21/63 + 12/9 = 5/3
   In mixed form: 12/3

MathStep (Works offline)

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

Related: ⁴²/₆₃+¹²/₉ ²¹/₆₃+²⁴/₉ ²¹/₆₃+¹²/₁₈ ²¹/₆₃+³⁶/₉ ²¹/₆₃+¹²/₂₇ ²¹/₆₃+⁶⁰/₉ ²¹/₆₃+¹²/₄₅ ²¹/₆₃+⁸⁴/₉ ²¹/₆₃+¹²/₆₃

Add Fractions Calculator