Answers

Subtract 15/54 from 2/42

2/42 - 15/54 is -29/126.

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,
   2/42 = 2 × 9/42 × 9 = 18/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   15/54 = 15 × 7/54 × 7 = 105/378
4. Subtract the two like fractions:
   18/378 - 105/378 = 18 - 105/378 = -87/378
5. After reducing the fraction, the answer is -29/126

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