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Subtract 9/40 from 8/10

8/10 - 9/40 is 23/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 40 is 40
  2. For the 1st fraction, since 10 × 4 = 40,
    8/10 = 8 × 4/10 × 4 = 32/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    9/40 = 9 × 1/40 × 1 = 9/40
  4. Subtract the two fractions:
    32/40 - 9/40 = 32 - 9/40 = 23/40

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