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Subtract 9/20 from 8/5

1st number: 1 3/5, 2nd number: 9/20

8/5 - 9/20 is 23/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 20 is 20
  2. For the 1st fraction, since 5 × 4 = 20,
    8/5 = 8 × 4/5 × 4 = 32/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    9/20 = 9 × 1/20 × 1 = 9/20
  4. Subtract the two fractions:
    32/20 - 9/20 = 32 - 9/20 = 23/20
  5. In mixed form: 13/20

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