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Subtract 42/30 from 25/84

1st number: 25/84, 2nd number: 1 12/30

25/84 - 42/30 is -463/420.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 30 is 420
  2. For the 1st fraction, since 84 × 5 = 420,
    25/84 = 25 × 5/84 × 5 = 125/420
  3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
    42/30 = 42 × 14/30 × 14 = 588/420
  4. Subtract the two fractions:
    125/420 - 588/420 = 125 - 588/420 = -463/420

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