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Subtract 20/12 from 30/20

1st number: 1 10/20, 2nd number: 1 8/12

30/20 - 20/12 is -1/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 12 is 60
  2. For the 1st fraction, since 20 × 3 = 60,
    30/20 = 30 × 3/20 × 3 = 90/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    20/12 = 20 × 5/12 × 5 = 100/60
  4. Subtract the two fractions:
    90/60 - 100/60 = 90 - 100/60 = -10/60
  5. After reducing the fraction, the answer is -1/6

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