Answers

Add 63/21 and 30/80

1^st number: 3 0/21, 2^nd number: 30/80

63/21 + 30/80 is 27/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 21 × 80 = 1680,
   63/21 = 63 × 80/21 × 80 = 5040/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   30/80 = 30 × 21/80 × 21 = 630/1680
4. Add the two like fractions:
   5040/1680 + 630/1680 = 5040 + 630/1680 = 5670/1680
5. 5670/1680 simplified gives 27/8
6. So, 63/21 + 30/80 = 27/8
   In mixed form: 33/8

MathStep (Works offline)

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

Related: ⁶³/₂₁+⁶⁰/₈₀ ⁶³/₄₂+³⁰/₈₀ ⁶³/₂₁+⁹⁰/₈₀

Add Fractions Calculator