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Subtract 2/5 from 4/42

4/42 - 2/5 is -32/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 5 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    4/42 = 4 × 5/42 × 5 = 20/210
  3. Likewise, for the 2nd fraction, since 5 × 42 = 210,
    2/5 = 2 × 42/5 × 42 = 84/210
  4. Subtract the two like fractions:
    20/210 - 84/210 = 20 - 84/210 = -64/210
  5. After reducing the fraction, the answer is -32/105

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