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Subtract 9/8 from 8/20

1st number: 8/20, 2nd number: 1 1/8

8/20 - 9/8 is -29/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 8 is 40
  2. For the 1st fraction, since 20 × 2 = 40,
    8/20 = 8 × 2/20 × 2 = 16/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    9/8 = 9 × 5/8 × 5 = 45/40
  4. Subtract the two fractions:
    16/40 - 45/40 = 16 - 45/40 = -29/40

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