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Add 84/40 and 12/21

1st number: 2 4/40, 2nd number: 12/21

84/40 + 12/21 is 187/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    84/40 = 84 × 21/40 × 21 = 1764/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    12/21 = 12 × 40/21 × 40 = 480/840
  4. Add the two like fractions:
    1764/840 + 480/840 = 1764 + 480/840 = 2244/840
  5. 2244/840 simplified gives 187/70
  6. So, 84/40 + 12/21 = 187/70
    In mixed form: 247/70

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