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Add 40/42 and 18/70

40/42 + 18/70 is 127/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 70 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    40/42 = 40 × 5/42 × 5 = 200/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    18/70 = 18 × 3/70 × 3 = 54/210
  4. Add the two like fractions:
    200/210 + 54/210 = 200 + 54/210 = 254/210
  5. 254/210 simplified gives 127/105
  6. So, 40/42 + 18/70 = 127/105
    In mixed form: 122/105

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