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Subtract 40/84 from 15/50

15/50 - 40/84 is -37/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 84 is 2100
  2. For the 1st fraction, since 50 × 42 = 2100,
    15/50 = 15 × 42/50 × 42 = 630/2100
  3. Likewise, for the 2nd fraction, since 84 × 25 = 2100,
    40/84 = 40 × 25/84 × 25 = 1000/2100
  4. Subtract the two fractions:
    630/2100 - 1000/2100 = 630 - 1000/2100 = -370/2100
  5. After reducing the fraction, the answer is -37/210

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