Answers

Add 21/56 and 84/20

1^st number: 21/56, 2^nd number: 4 4/20

21/56 + 84/20 is 183/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 20 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 56 × 5 = 280,
   21/56 = 21 × 5/56 × 5 = 105/280
3. Likewise, for the 2nd fraction, since 20 × 14 = 280,
   84/20 = 84 × 14/20 × 14 = 1176/280
4. Add the two like fractions:
   105/280 + 1176/280 = 105 + 1176/280 = 1281/280
5. 1281/280 simplified gives 183/40
6. So, 21/56 + 84/20 = 183/40
   In mixed form: 423/40

MathStep (Works offline)

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

Related: ⁴²/₅₆+⁸⁴/₂₀ ²¹/₅₆+⁸⁴/₄₀ ⁶³/₅₆+⁸⁴/₂₀ ²¹/₅₆+⁸⁴/₆₀

Add Fractions Calculator