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Subtract 9/40 from 1/5

1/5 - 9/40 is -1/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 40 is 40

    Next, find the equivalent fraction of both fractional numbers with denominator 40
  2. For the 1st fraction, since 5 × 8 = 40,
    1/5 = 1 × 8/5 × 8 = 8/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    9/40 = 9 × 1/40 × 1 = 9/40
  4. Subtract the two like fractions:
    8/40 - 9/40 = 8 - 9/40 = -1/40

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