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Subtract 90/16 from 12/45

1st number: 12/45, 2nd number: 5 10/16

12/45 - 90/16 is -643/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 16 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 45 × 16 = 720,
    12/45 = 12 × 16/45 × 16 = 192/720
  3. Likewise, for the 2nd fraction, since 16 × 45 = 720,
    90/16 = 90 × 45/16 × 45 = 4050/720
  4. Subtract the two like fractions:
    192/720 - 4050/720 = 192 - 4050/720 = -3858/720
  5. After reducing the fraction, the answer is -643/120

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