Answers

Subtract 49/12 from 90/42

1^st number: 2 6/42, 2^nd number: 4 1/12

90/42 - 49/12 is -163/84.

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,
   90/42 = 90 × 2/42 × 2 = 180/84
3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
   49/12 = 49 × 7/12 × 7 = 343/84
4. Subtract the two like fractions:
   180/84 - 343/84 = 180 - 343/84 = -163/84

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