Answers

Add 18/20 and 84/56

1^st number: 18/20, 2^nd number: 1 28/56

18/20 + 84/56 is 12/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 20 × 14 = 280,
   18/20 = 18 × 14/20 × 14 = 252/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   84/56 = 84 × 5/56 × 5 = 420/280
4. Add the two like fractions:
   252/280 + 420/280 = 252 + 420/280 = 672/280
5. 672/280 simplified gives 12/5
6. So, 18/20 + 84/56 = 12/5
   In mixed form: 22/5

MathStep (Works offline)

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

Related: ³⁶/₂₀+⁸⁴/₅₆ ¹⁸/₄₀+⁸⁴/₅₆ ⁵⁴/₂₀+⁸⁴/₅₆ ¹⁸/₆₀+⁸⁴/₅₆ ⁹⁰/₂₀+⁸⁴/₅₆

Add Fractions Calculator