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Subtract 40/42 from 10/35

10/35 - 40/42 is -2/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 42 is 210
  2. For the 1st fraction, since 35 × 6 = 210,
    10/35 = 10 × 6/35 × 6 = 60/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    40/42 = 40 × 5/42 × 5 = 200/210
  4. Subtract the two fractions:
    60/210 - 200/210 = 60 - 200/210 = -140/210
  5. After reducing the fraction, the answer is -2/3

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