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Subtract 90/6 from 54/15

1st number: 3 9/15, 2nd number: 15 0/6

54/15 - 90/6 is -57/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 6 is 30
  2. For the 1st fraction, since 15 × 2 = 30,
    54/15 = 54 × 2/15 × 2 = 108/30
  3. Likewise, for the 2nd fraction, since 6 × 5 = 30,
    90/6 = 90 × 5/6 × 5 = 450/30
  4. Subtract the two fractions:
    108/30 - 450/30 = 108 - 450/30 = -342/30
  5. After reducing the fraction, the answer is -57/5

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