Answers

Subtract 15/14 from 12/21

1^st number: 12/21, 2^nd number: 1 1/14

12/21 - 15/14 is -1/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 14 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 21 × 2 = 42,
   12/21 = 12 × 2/21 × 2 = 24/42
3. Likewise, for the 2nd fraction, since 14 × 3 = 42,
   15/14 = 15 × 3/14 × 3 = 45/42
4. Subtract the two like fractions:
   24/42 - 45/42 = 24 - 45/42 = -21/42
5. After reducing the fraction, the answer is -1/2

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