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Subtract 16/18 from 21/8

1st number: 2 5/8, 2nd number: 16/18

21/8 - 16/18 is 125/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 18 is 72
  2. For the 1st fraction, since 8 × 9 = 72,
    21/8 = 21 × 9/8 × 9 = 189/72
  3. Likewise, for the 2nd fraction, since 18 × 4 = 72,
    16/18 = 16 × 4/18 × 4 = 64/72
  4. Subtract the two fractions:
    189/72 - 64/72 = 189 - 64/72 = 125/72
  5. In mixed form: 153/72

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