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Subtract 4/10 from 2/42

2/42 - 4/10 is -37/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 10 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    2/42 = 2 × 5/42 × 5 = 10/210
  3. Likewise, for the 2nd fraction, since 10 × 21 = 210,
    4/10 = 4 × 21/10 × 21 = 84/210
  4. Subtract the two like fractions:
    10/210 - 84/210 = 10 - 84/210 = -74/210
  5. After reducing the fraction, the answer is -37/105

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