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Subtract 12/24 from 15/90

15/90 - 12/24 is -1/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 24 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 90 × 4 = 360,
    15/90 = 15 × 4/90 × 4 = 60/360
  3. Likewise, for the 2nd fraction, since 24 × 15 = 360,
    12/24 = 12 × 15/24 × 15 = 180/360
  4. Subtract the two like fractions:
    60/360 - 180/360 = 60 - 180/360 = -120/360
  5. After reducing the fraction, the answer is -1/3

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