Answers

Subtract 21/12 from 18/14

1^st number: 1 4/14, 2^nd number: 1 9/12

18/14 - 21/12 is -13/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 14 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 14 × 6 = 84,
   18/14 = 18 × 6/14 × 6 = 108/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   21/12 = 21 × 7/12 × 7 = 147/84
4. Subtract the two like fractions:
   108/84 - 147/84 = 108 - 147/84 = -39/84
5. After reducing the fraction, the answer is -13/28

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