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Subtract 9/30 from 8/40

8/40 - 9/30 is -1/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    8/40 = 8 × 3/40 × 3 = 24/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    9/30 = 9 × 4/30 × 4 = 36/120
  4. Subtract the two like fractions:
    24/120 - 36/120 = 24 - 36/120 = -12/120
  5. After reducing the fraction, the answer is -1/10

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