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Subtract 42/15 from 10/42

1st number: 10/42, 2nd number: 2 12/15

10/42 - 42/15 is -269/105.

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,
    10/42 = 10 × 5/42 × 5 = 50/210
  3. Likewise, for the 2nd fraction, since 15 × 14 = 210,
    42/15 = 42 × 14/15 × 14 = 588/210
  4. Subtract the two fractions:
    50/210 - 588/210 = 50 - 588/210 = -538/210
  5. After reducing the fraction, the answer is -269/105

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