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Subtract 10/12 from 30/84

30/84 - 10/12 is -10/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 12 is 84
  2. For the 1st fraction, since 84 × 1 = 84,
    30/84 = 30 × 1/84 × 1 = 30/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    10/12 = 10 × 7/12 × 7 = 70/84
  4. Subtract the two fractions:
    30/84 - 70/84 = 30 - 70/84 = -40/84
  5. After reducing the fraction, the answer is -10/21

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