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Subtract 70/20 from 12/9

1st number: 1 3/9, 2nd number: 3 10/20

12/9 - 70/20 is -13/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 9 × 20 = 180,
    12/9 = 12 × 20/9 × 20 = 240/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    70/20 = 70 × 9/20 × 9 = 630/180
  4. Subtract the two like fractions:
    240/180 - 630/180 = 240 - 630/180 = -390/180
  5. After reducing the fraction, the answer is -13/6

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