Answers

Subtract 45/54 from 9/42

9/42 - 45/54 is -13/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 42 × 9 = 378,
   9/42 = 9 × 9/42 × 9 = 81/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   45/54 = 45 × 7/54 × 7 = 315/378
4. Subtract the two like fractions:
   81/378 - 315/378 = 81 - 315/378 = -234/378
5. After reducing the fraction, the answer is -13/21

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