Answers

Add 63/56 and 90/21

1^st number: 1 7/56, 2^nd number: 4 6/21

63/56 + 90/21 is 303/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 56 × 3 = 168,
   63/56 = 63 × 3/56 × 3 = 189/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   90/21 = 90 × 8/21 × 8 = 720/168
4. Add the two like fractions:
   189/168 + 720/168 = 189 + 720/168 = 909/168
5. 909/168 simplified gives 303/56
6. So, 63/56 + 90/21 = 303/56
   In mixed form: 523/56

MathStep (Works offline)

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

Related: ⁶³/₅₆+⁹⁰/₄₂ ⁶³/₅₆+⁹⁰/₆₃

Add Fractions Calculator