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Subtract 8/70 from 3/42

3/42 - 8/70 is -3/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 70 is 210
  2. For the 1st fraction, since 42 × 5 = 210,
    3/42 = 3 × 5/42 × 5 = 15/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    8/70 = 8 × 3/70 × 3 = 24/210
  4. Subtract the two fractions:
    15/210 - 24/210 = 15 - 24/210 = -9/210
  5. After reducing the fraction, the answer is -3/70

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