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Subtract 2/10 from 7/40

7/40 - 2/10 is -1/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 10 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 40 × 1 = 40,
    7/40 = 7 × 1/40 × 1 = 7/40
  3. Likewise, for the 2nd fraction, since 10 × 4 = 40,
    2/10 = 2 × 4/10 × 4 = 8/40
  4. Subtract the two like fractions:
    7/40 - 8/40 = 7 - 8/40 = -1/40

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