Answers

Add 80/21 and 35/80

1^st number: 3 17/21, 2^nd number: 35/80

80/21 + 35/80 is 1427/336.

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,
   80/21 = 80 × 80/21 × 80 = 6400/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   35/80 = 35 × 21/80 × 21 = 735/1680
4. Add the two like fractions:
   6400/1680 + 735/1680 = 6400 + 735/1680 = 7135/1680
5. 7135/1680 simplified gives 1427/336
6. So, 80/21 + 35/80 = 1427/336
   In mixed form: 483/336

MathStep (Works offline)

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

Related: ⁸⁰/₂₁+⁷⁰/₈₀ ⁸⁰/₄₂+³⁵/₈₀ ⁸⁰/₆₃+³⁵/₈₀

Add Fractions Calculator