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Subtract 42/70 from 4/15

4/15 - 42/70 is -1/3.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 70 is 210
  2. For the 1st fraction, since 15 × 14 = 210,
    4/15 = 4 × 14/15 × 14 = 56/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    42/70 = 42 × 3/70 × 3 = 126/210
  4. Subtract the two fractions:
    56/210 - 126/210 = 56 - 126/210 = -70/210
  5. After reducing the fraction, the answer is -1/3

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