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Subtract 45/50 from 8/20

8/20 - 45/50 is -1/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 50 is 100
  2. For the 1st fraction, since 20 × 5 = 100,
    8/20 = 8 × 5/20 × 5 = 40/100
  3. Likewise, for the 2nd fraction, since 50 × 2 = 100,
    45/50 = 45 × 2/50 × 2 = 90/100
  4. Subtract the two fractions:
    40/100 - 90/100 = 40 - 90/100 = -50/100
  5. After reducing the fraction, the answer is -1/2

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