Answers

Subtract 12/54 from 12/21

12/21 - 12/54 is 22/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   12/21 = 12 × 18/21 × 18 = 216/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   12/54 = 12 × 7/54 × 7 = 84/378
4. Subtract the two like fractions:
   216/378 - 84/378 = 216 - 84/378 = 132/378
5. After reducing the fraction, the answer is 22/63

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