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Subtract 1/7 from 20/12

1st number: 1 8/12, 2nd number: 1/7

20/12 - 1/7 is 32/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 7 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    20/12 = 20 × 7/12 × 7 = 140/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    1/7 = 1 × 12/7 × 12 = 12/84
  4. Subtract the two like fractions:
    140/84 - 12/84 = 140 - 12/84 = 128/84
  5. After reducing the fraction, the answer is 32/21
  6. In mixed form: 111/21

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