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Subtract 80/84 from 15/25

15/25 - 80/84 is -37/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 84 is 2100
  2. For the 1st fraction, since 25 × 84 = 2100,
    15/25 = 15 × 84/25 × 84 = 1260/2100
  3. Likewise, for the 2nd fraction, since 84 × 25 = 2100,
    80/84 = 80 × 25/84 × 25 = 2000/2100
  4. Subtract the two fractions:
    1260/2100 - 2000/2100 = 1260 - 2000/2100 = -740/2100
  5. After reducing the fraction, the answer is -37/105

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