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Subtract 1/42 from 1/2

1/2 - 1/42 is 10/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 42 is 42
  2. For the 1st fraction, since 2 × 21 = 42,
    1/2 = 1 × 21/2 × 21 = 21/42
  3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
    1/42 = 1 × 1/42 × 1 = 1/42
  4. Subtract the two fractions:
    21/42 - 1/42 = 21 - 1/42 = 20/42
  5. After reducing the fraction, the answer is 10/21

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