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Subtract 40/49 from 21/10

1st number: 2 1/10, 2nd number: 40/49

21/10 - 40/49 is 629/490.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 49 is 490
  2. For the 1st fraction, since 10 × 49 = 490,
    21/10 = 21 × 49/10 × 49 = 1029/490
  3. Likewise, for the 2nd fraction, since 49 × 10 = 490,
    40/49 = 40 × 10/49 × 10 = 400/490
  4. Subtract the two fractions:
    1029/490 - 400/490 = 1029 - 400/490 = 629/490
  5. In mixed form: 1139/490

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