Answers

Add 30/63 and 3/21

30/63 + 3/21 is 13/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 63 × 1 = 63,
   30/63 = 30 × 1/63 × 1 = 30/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   3/21 = 3 × 3/21 × 3 = 9/63
4. Add the two like fractions:
   30/63 + 9/63 = 30 + 9/63 = 39/63
5. 39/63 simplified gives 13/21
6. So, 30/63 + 3/21 = 13/21

MathStep (Works offline)

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

Related: ⁶⁰/₆₃+³/₂₁ ³⁰/₆₃+⁶/₂₁ ³⁰/₆₃+³/₄₂ ⁹⁰/₆₃+³/₂₁ ³⁰/₆₃+⁹/₂₁ ³⁰/₆₃+³/₆₃ ³⁰/₆₃+¹⁵/₂₁

Add Fractions Calculator