Answers

Subtract 9/4 from 15/42

1^st number: 15/42, 2^nd number: 2 1/4

15/42 - 9/4 is -53/28.

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,
   15/42 = 15 × 2/42 × 2 = 30/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   9/4 = 9 × 21/4 × 21 = 189/84
4. Subtract the two like fractions:
   30/84 - 189/84 = 30 - 189/84 = -159/84
5. After reducing the fraction, the answer is -53/28

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