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Subtract 9/21 from 63/8

1st number: 7 7/8, 2nd number: 9/21

63/8 - 9/21 is 417/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 21 is 168
  2. For the 1st fraction, since 8 × 21 = 168,
    63/8 = 63 × 21/8 × 21 = 1323/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    9/21 = 9 × 8/21 × 8 = 72/168
  4. Subtract the two fractions:
    1323/168 - 72/168 = 1323 - 72/168 = 1251/168
  5. After reducing the fraction, the answer is 417/56
  6. In mixed form: 725/56

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