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Subtract 3/28 from 1/20

1/20 - 3/28 is -2/35.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    1/20 = 1 × 7/20 × 7 = 7/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    3/28 = 3 × 5/28 × 5 = 15/140
  4. Subtract the two like fractions:
    7/140 - 15/140 = 7 - 15/140 = -8/140
  5. After reducing the fraction, the answer is -2/35

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