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Subtract 45/30 from 3/20

1st number: 3/20, 2nd number: 1 15/30

3/20 - 45/30 is -27/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 30 is 60
  2. For the 1st fraction, since 20 × 3 = 60,
    3/20 = 3 × 3/20 × 3 = 9/60
  3. Likewise, for the 2nd fraction, since 30 × 2 = 60,
    45/30 = 45 × 2/30 × 2 = 90/60
  4. Subtract the two fractions:
    9/60 - 90/60 = 9 - 90/60 = -81/60
  5. After reducing the fraction, the answer is -27/20

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