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Add 8/20 and 21/56

8/20 + 21/56 is 31/40.

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,
    8/20 = 8 × 14/20 × 14 = 112/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    21/56 = 21 × 5/56 × 5 = 105/280
  4. Add the two like fractions:
    112/280 + 105/280 = 112 + 105/280 = 217/280
  5. 217/280 simplified gives 31/40
  6. So, 8/20 + 21/56 = 31/40

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