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Subtract 12/16 from 15/90

15/90 - 12/16 is -7/12.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 16 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    15/90 = 15 × 8/90 × 8 = 120/720
  3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
    12/16 = 12 × 45/16 × 45 = 540/720
  4. Subtract the two like fractions:
    120/720 - 540/720 = 120 - 540/720 = -420/720
  5. After reducing the fraction, the answer is -7/12

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