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Add 7/42 and 7/80

7/42 + 7/80 is 61/240.

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,
    7/42 = 7 × 40/42 × 40 = 280/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    7/80 = 7 × 21/80 × 21 = 147/1680
  4. Add the two like fractions:
    280/1680 + 147/1680 = 280 + 147/1680 = 427/1680
  5. 427/1680 simplified gives 61/240
  6. So, 7/42 + 7/80 = 61/240

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