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Subtract 18/28 from 36/70

36/70 - 18/28 is -9/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 28 is 140
  2. For the 1st fraction, since 70 × 2 = 140,
    36/70 = 36 × 2/70 × 2 = 72/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    18/28 = 18 × 5/28 × 5 = 90/140
  4. Subtract the two fractions:
    72/140 - 90/140 = 72 - 90/140 = -18/140
  5. After reducing the fraction, the answer is -9/70

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