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Subtract 40/7 from 18/5

1st number: 3 3/5, 2nd number: 5 5/7

18/5 - 40/7 is -74/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 7 is 35

    Next, find the equivalent fraction of both fractional numbers with denominator 35
  2. For the 1st fraction, since 5 × 7 = 35,
    18/5 = 18 × 7/5 × 7 = 126/35
  3. Likewise, for the 2nd fraction, since 7 × 5 = 35,
    40/7 = 40 × 5/7 × 5 = 200/35
  4. Subtract the two like fractions:
    126/35 - 200/35 = 126 - 200/35 = -74/35

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