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Subtract 54/15 from 1/28

1st number: 1/28, 2nd number: 3 9/15

1/28 - 54/15 is -499/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 15 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 28 × 15 = 420,
    1/28 = 1 × 15/28 × 15 = 15/420
  3. Likewise, for the 2nd fraction, since 15 × 28 = 420,
    54/15 = 54 × 28/15 × 28 = 1512/420
  4. Subtract the two like fractions:
    15/420 - 1512/420 = 15 - 1512/420 = -1497/420
  5. After reducing the fraction, the answer is -499/140

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