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Subtract 45/84 from 4/10

4/10 - 45/84 is -19/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 84 is 420
  2. For the 1st fraction, since 10 × 42 = 420,
    4/10 = 4 × 42/10 × 42 = 168/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    45/84 = 45 × 5/84 × 5 = 225/420
  4. Subtract the two fractions:
    168/420 - 225/420 = 168 - 225/420 = -57/420
  5. After reducing the fraction, the answer is -19/140

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