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Subtract 9/5 from 9/20

1st number: 9/20, 2nd number: 1 4/5

9/20 - 9/5 is -27/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 5 is 20
  2. For the 1st fraction, since 20 × 1 = 20,
    9/20 = 9 × 1/20 × 1 = 9/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    9/5 = 9 × 4/5 × 4 = 36/20
  4. Subtract the two fractions:
    9/20 - 36/20 = 9 - 36/20 = -27/20

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