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Add 5/42 and 70/80

5/42 + 70/80 is 167/168.

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,
    5/42 = 5 × 40/42 × 40 = 200/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    70/80 = 70 × 21/80 × 21 = 1470/1680
  4. Add the two like fractions:
    200/1680 + 1470/1680 = 200 + 1470/1680 = 1670/1680
  5. 1670/1680 simplified gives 167/168
  6. So, 5/42 + 70/80 = 167/168

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