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Subtract 9/20 from 1/2

1/2 - 9/20 is 1/20.

Steps for subtracting fractions

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

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