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Subtract 72/45 from 1/28

1st number: 1/28, 2nd number: 1 27/45

1/28 - 72/45 is -219/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 45 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    1/28 = 1 × 45/28 × 45 = 45/1260
  3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
    72/45 = 72 × 28/45 × 28 = 2016/1260
  4. Subtract the two like fractions:
    45/1260 - 2016/1260 = 45 - 2016/1260 = -1971/1260
  5. After reducing the fraction, the answer is -219/140

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