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Subtract 20/56 from 18/70

18/70 - 20/56 is -1/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 56 is 280
  2. For the 1st fraction, since 70 × 4 = 280,
    18/70 = 18 × 4/70 × 4 = 72/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    20/56 = 20 × 5/56 × 5 = 100/280
  4. Subtract the two fractions:
    72/280 - 100/280 = 72 - 100/280 = -28/280
  5. After reducing the fraction, the answer is -1/10

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