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Subtract 21/8 from 18/2

1st number: 9 0/2, 2nd number: 2 5/8

18/2 - 21/8 is 51/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 8 is 8
  2. For the 1st fraction, since 2 × 4 = 8,
    18/2 = 18 × 4/2 × 4 = 72/8
  3. Likewise, for the 2nd fraction, since 8 × 1 = 8,
    21/8 = 21 × 1/8 × 1 = 21/8
  4. Subtract the two fractions:
    72/8 - 21/8 = 72 - 21/8 = 51/8
  5. In mixed form: 63/8

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