Answers

Add 28/21 and 2/80

1^st number: 1 7/21, 2^nd number: 2/80

28/21 + 2/80 is 163/120.

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,
   28/21 = 28 × 80/21 × 80 = 2240/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   2/80 = 2 × 21/80 × 21 = 42/1680
4. Add the two like fractions:
   2240/1680 + 42/1680 = 2240 + 42/1680 = 2282/1680
5. 2282/1680 simplified gives 163/120
6. So, 28/21 + 2/80 = 163/120
   In mixed form: 143/120

MathStep (Works offline)

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

Related: ⁵⁶/₂₁+²/₈₀ ²⁸/₂₁+⁴/₈₀ ²⁸/₄₂+²/₈₀ ⁸⁴/₂₁+²/₈₀ ²⁸/₂₁+⁶/₈₀ ²⁸/₆₃+²/₈₀ ²⁸/₂₁+¹⁰/₈₀ ²⁸/₂₁+¹⁴/₈₀

Add Fractions Calculator