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Subtract 15/20 from 3/6

3/6 - 15/20 is -1/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 6 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 6 × 10 = 60,
    3/6 = 3 × 10/6 × 10 = 30/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    15/20 = 15 × 3/20 × 3 = 45/60
  4. Subtract the two like fractions:
    30/60 - 45/60 = 30 - 45/60 = -15/60
  5. After reducing the fraction, the answer is -1/4

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