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Subtract 45/40 from 50/21

1st number: 2 8/21, 2nd number: 1 5/40

50/21 - 45/40 is 211/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840
  2. For the 1st fraction, since 21 × 40 = 840,
    50/21 = 50 × 40/21 × 40 = 2000/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    45/40 = 45 × 21/40 × 21 = 945/840
  4. Subtract the two fractions:
    2000/840 - 945/840 = 2000 - 945/840 = 1055/840
  5. After reducing the fraction, the answer is 211/168
  6. In mixed form: 143/168

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