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Subtract 21/20 from 3/2

1st number: 1 1/2, 2nd number: 1 1/20

3/2 - 21/20 is 9/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 20 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 2 × 10 = 20,
    3/2 = 3 × 10/2 × 10 = 30/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    21/20 = 21 × 1/20 × 1 = 21/20
  4. Subtract the two like fractions:
    30/20 - 21/20 = 30 - 21/20 = 9/20

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