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Subtract 40/49 from 21/50

21/50 - 40/49 is -971/2450.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 49 is 2450
  2. For the 1st fraction, since 50 × 49 = 2450,
    21/50 = 21 × 49/50 × 49 = 1029/2450
  3. Likewise, for the 2nd fraction, since 49 × 50 = 2450,
    40/49 = 40 × 50/49 × 50 = 2000/2450
  4. Subtract the two fractions:
    1029/2450 - 2000/2450 = 1029 - 2000/2450 = -971/2450

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