Answers

Subtract 27/4 from 90/42

1^st number: 2 6/42, 2^nd number: 6 3/4

90/42 - 27/4 is -129/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   90/42 = 90 × 2/42 × 2 = 180/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   27/4 = 27 × 21/4 × 21 = 567/84
4. Subtract the two like fractions:
   180/84 - 567/84 = 180 - 567/84 = -387/84
5. After reducing the fraction, the answer is -129/28

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