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Subtract 80/21 from 50/72

1st number: 50/72, 2nd number: 3 17/21

50/72 - 80/21 is -785/252.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 21 is 504
  2. For the 1st fraction, since 72 × 7 = 504,
    50/72 = 50 × 7/72 × 7 = 350/504
  3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
    80/21 = 80 × 24/21 × 24 = 1920/504
  4. Subtract the two fractions:
    350/504 - 1920/504 = 350 - 1920/504 = -1570/504
  5. After reducing the fraction, the answer is -785/252

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