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Subtract 20/56 from 12/90

12/90 - 20/56 is -47/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 56 is 2520
  2. For the 1st fraction, since 90 × 28 = 2520,
    12/90 = 12 × 28/90 × 28 = 336/2520
  3. Likewise, for the 2nd fraction, since 56 × 45 = 2520,
    20/56 = 20 × 45/56 × 45 = 900/2520
  4. Subtract the two fractions:
    336/2520 - 900/2520 = 336 - 900/2520 = -564/2520
  5. After reducing the fraction, the answer is -47/210

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