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Subtract 4/9 from 7/42

7/42 - 4/9 is -5/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 9 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    7/42 = 7 × 3/42 × 3 = 21/126
  3. Likewise, for the 2nd fraction, since 9 × 14 = 126,
    4/9 = 4 × 14/9 × 14 = 56/126
  4. Subtract the two like fractions:
    21/126 - 56/126 = 21 - 56/126 = -35/126
  5. After reducing the fraction, the answer is -5/18

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