Answers

Subtract 27/42 from 45/54

45/54 - 27/42 is 4/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 42 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   45/54 = 45 × 7/54 × 7 = 315/378
3. Likewise, for the 2nd fraction, since 42 × 9 = 378,
   27/42 = 27 × 9/42 × 9 = 243/378
4. Subtract the two like fractions:
   315/378 - 243/378 = 315 - 243/378 = 72/378
5. After reducing the fraction, the answer is 4/21

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