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Subtract 27/20 from 3/28

1st number: 3/28, 2nd number: 1 7/20

3/28 - 27/20 is -87/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    3/28 = 3 × 5/28 × 5 = 15/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    27/20 = 27 × 7/20 × 7 = 189/140
  4. Subtract the two like fractions:
    15/140 - 189/140 = 15 - 189/140 = -174/140
  5. After reducing the fraction, the answer is -87/70

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