Answers

Subtract 20/54 from 5/63

5/63 - 20/54 is -55/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 63 × 6 = 378,
   5/63 = 5 × 6/63 × 6 = 30/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   20/54 = 20 × 7/54 × 7 = 140/378
4. Subtract the two like fractions:
   30/378 - 140/378 = 30 - 140/378 = -110/378
5. After reducing the fraction, the answer is -55/189

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