Answers

Subtract 1/63 from 21/54

21/54 - 1/63 is 47/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 63 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   21/54 = 21 × 7/54 × 7 = 147/378
3. Likewise, for the 2nd fraction, since 63 × 6 = 378,
   1/63 = 1 × 6/63 × 6 = 6/378
4. Subtract the two like fractions:
   147/378 - 6/378 = 147 - 6/378 = 141/378
5. After reducing the fraction, the answer is 47/126

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