Answers

Add 45/21 and 35/80

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

45/21 + 35/80 is 289/112.

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,
   45/21 = 45 × 80/21 × 80 = 3600/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   35/80 = 35 × 21/80 × 21 = 735/1680
4. Add the two like fractions:
   3600/1680 + 735/1680 = 3600 + 735/1680 = 4335/1680
5. 4335/1680 simplified gives 289/112
6. So, 45/21 + 35/80 = 289/112
   In mixed form: 265/112

MathStep (Works offline)

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

Related: ⁹⁰/₂₁+³⁵/₈₀ ⁴⁵/₂₁+⁷⁰/₈₀ ⁴⁵/₄₂+³⁵/₈₀ ⁴⁵/₆₃+³⁵/₈₀

Add Fractions Calculator