Answers

Subtract 54/21 from 63/18

1^st number: 3 9/18, 2^nd number: 2 12/21

63/18 - 54/21 is 13/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   63/18 = 63 × 7/18 × 7 = 441/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   54/21 = 54 × 6/21 × 6 = 324/126
4. Subtract the two like fractions:
   441/126 - 324/126 = 441 - 324/126 = 117/126
5. After reducing the fraction, the answer is 13/14

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