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Subtract 63/42 from 9/16

1st number: 9/16, 2nd number: 1 21/42

9/16 - 63/42 is -15/16.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 42 is 336
  2. For the 1st fraction, since 16 × 21 = 336,
    9/16 = 9 × 21/16 × 21 = 189/336
  3. Likewise, for the 2nd fraction, since 42 × 8 = 336,
    63/42 = 63 × 8/42 × 8 = 504/336
  4. Subtract the two fractions:
    189/336 - 504/336 = 189 - 504/336 = -315/336
  5. After reducing the fraction, the answer is -15/16

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