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Subtract 90/63 from 15/54

1st number: 15/54, 2nd number: 1 27/63

15/54 - 90/63 is -145/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 63 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    15/54 = 15 × 7/54 × 7 = 105/378
  3. Likewise, for the 2nd fraction, since 63 × 6 = 378,
    90/63 = 90 × 6/63 × 6 = 540/378
  4. Subtract the two like fractions:
    105/378 - 540/378 = 105 - 540/378 = -435/378
  5. After reducing the fraction, the answer is -145/126

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