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Add 72/42 and 84/80

1st number: 1 30/42, 2nd number: 1 4/80

72/42 + 84/80 is 387/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    72/42 = 72 × 40/42 × 40 = 2880/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    84/80 = 84 × 21/80 × 21 = 1764/1680
  4. Add the two like fractions:
    2880/1680 + 1764/1680 = 2880 + 1764/1680 = 4644/1680
  5. 4644/1680 simplified gives 387/140
  6. So, 72/42 + 84/80 = 387/140
    In mixed form: 2107/140

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