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Subtract 9/40 from 12/15

12/15 - 9/40 is 23/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 40 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 15 × 8 = 120,
    12/15 = 12 × 8/15 × 8 = 96/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    9/40 = 9 × 3/40 × 3 = 27/120
  4. Subtract the two like fractions:
    96/120 - 27/120 = 96 - 27/120 = 69/120
  5. After reducing the fraction, the answer is 23/40

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