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Add 21/15 and 12/56

1st number: 1 6/15, 2nd number: 12/56

21/15 + 12/56 is 113/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 56 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 15 × 56 = 840,
    21/15 = 21 × 56/15 × 56 = 1176/840
  3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
    12/56 = 12 × 15/56 × 15 = 180/840
  4. Add the two like fractions:
    1176/840 + 180/840 = 1176 + 180/840 = 1356/840
  5. 1356/840 simplified gives 113/70
  6. So, 21/15 + 12/56 = 113/70
    In mixed form: 143/70

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