Answers

Subtract 27/7 from 20/12

1^st number: 1 8/12, 2^nd number: 3 6/7

20/12 - 27/7 is -46/21.

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,
   27/7 = 27 × 12/7 × 12 = 324/84
4. Subtract the two like fractions:
   140/84 - 324/84 = 140 - 324/84 = -184/84
5. After reducing the fraction, the answer is -46/21

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