Answers

Subtract 81/12 from 42/28

1^st number: 1 14/28, 2^nd number: 6 9/12

42/28 - 81/12 is -21/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 12 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 28 × 3 = 84,
   42/28 = 42 × 3/28 × 3 = 126/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   81/12 = 81 × 7/12 × 7 = 567/84
4. Subtract the two like fractions:
   126/84 - 567/84 = 126 - 567/84 = -441/84
5. After reducing the fraction, the answer is -21/4

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