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Subtract 30/42 from 2/3

2/3 - 30/42 is -1/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 42 is 42
  2. For the 1st fraction, since 3 × 14 = 42,
    2/3 = 2 × 14/3 × 14 = 28/42
  3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
    30/42 = 30 × 1/42 × 1 = 30/42
  4. Subtract the two fractions:
    28/42 - 30/42 = 28 - 30/42 = -2/42
  5. After reducing the fraction, the answer is -1/21

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