Answers

Subtract 1/42 from 7/54

7/54 - 1/42 is 20/189.

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,
   7/54 = 7 × 7/54 × 7 = 49/378
3. Likewise, for the 2nd fraction, since 42 × 9 = 378,
   1/42 = 1 × 9/42 × 9 = 9/378
4. Subtract the two like fractions:
   49/378 - 9/378 = 49 - 9/378 = 40/378
5. After reducing the fraction, the answer is 20/189

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