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Subtract 35/70 from 9/42

9/42 - 35/70 is -2/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 70 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    9/42 = 9 × 5/42 × 5 = 45/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    35/70 = 35 × 3/70 × 3 = 105/210
  4. Subtract the two like fractions:
    45/210 - 105/210 = 45 - 105/210 = -60/210
  5. After reducing the fraction, the answer is -2/7

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