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Subtract 40/49 from 21/8

1st number: 2 5/8, 2nd number: 40/49

21/8 - 40/49 is 709/392.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 49 is 392
  2. For the 1st fraction, since 8 × 49 = 392,
    21/8 = 21 × 49/8 × 49 = 1029/392
  3. Likewise, for the 2nd fraction, since 49 × 8 = 392,
    40/49 = 40 × 8/49 × 8 = 320/392
  4. Subtract the two fractions:
    1029/392 - 320/392 = 1029 - 320/392 = 709/392
  5. In mixed form: 1317/392

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