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Subtract 42/15 from 1/42

1st number: 1/42, 2nd number: 2 12/15

1/42 - 42/15 is -583/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 15 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    1/42 = 1 × 5/42 × 5 = 5/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    42/15 = 42 × 14/15 × 14 = 588/210
  4. Subtract the two fractions:
    5/210 - 588/210 = 5 - 588/210 = -583/210

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