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Subtract 15/28 from 4/42

4/42 - 15/28 is -37/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 28 is 84
  2. For the 1st fraction, since 42 × 2 = 84,
    4/42 = 4 × 2/42 × 2 = 8/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    15/28 = 15 × 3/28 × 3 = 45/84
  4. Subtract the two fractions:
    8/84 - 45/84 = 8 - 45/84 = -37/84

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