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Subtract 9/10 from 3/20

3/20 - 9/10 is -3/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 10 is 20
  2. For the 1st fraction, since 20 × 1 = 20,
    3/20 = 3 × 1/20 × 1 = 3/20
  3. Likewise, for the 2nd fraction, since 10 × 2 = 20,
    9/10 = 9 × 2/10 × 2 = 18/20
  4. Subtract the two fractions:
    3/20 - 18/20 = 3 - 18/20 = -15/20
  5. After reducing the fraction, the answer is -3/4

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