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Subtract 18/8 from 18/10

1st number: 1 8/10, 2nd number: 2 2/8

18/10 - 18/8 is -9/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 8 is 40
  2. For the 1st fraction, since 10 × 4 = 40,
    18/10 = 18 × 4/10 × 4 = 72/40
  3. Likewise, for the 2nd fraction, since 8 × 5 = 40,
    18/8 = 18 × 5/8 × 5 = 90/40
  4. Subtract the two fractions:
    72/40 - 90/40 = 72 - 90/40 = -18/40
  5. After reducing the fraction, the answer is -9/20

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