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Subtract 8/18 from 15/70

15/70 - 8/18 is -29/126.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 18 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    15/70 = 15 × 9/70 × 9 = 135/630
  3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
    8/18 = 8 × 35/18 × 35 = 280/630
  4. Subtract the two fractions:
    135/630 - 280/630 = 135 - 280/630 = -145/630
  5. After reducing the fraction, the answer is -29/126

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