Answers

Subtract 15/12 from 28/42

1^st number: 28/42, 2^nd number: 1 3/12

28/42 - 15/12 is -7/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   28/42 = 28 × 2/42 × 2 = 56/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   15/12 = 15 × 7/12 × 7 = 105/84
4. Subtract the two like fractions:
   56/84 - 105/84 = 56 - 105/84 = -49/84
5. After reducing the fraction, the answer is -7/12

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