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Add 21/56 and 18/20

21/56 + 18/20 is 51/40.

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,
    18/20 = 18 × 14/20 × 14 = 252/280
  4. Add the two like fractions:
    105/280 + 252/280 = 105 + 252/280 = 357/280
  5. 357/280 simplified gives 51/40
  6. So, 21/56 + 18/20 = 51/40
    In mixed form: 111/40

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