Answers

Subtract 7/63 from 54/21

1^st number: 2 12/21, 2^nd number: 7/63

54/21 - 7/63 is 155/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 63 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 21 × 3 = 63,
   54/21 = 54 × 3/21 × 3 = 162/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   7/63 = 7 × 1/63 × 1 = 7/63
4. Subtract the two like fractions:
   162/63 - 7/63 = 162 - 7/63 = 155/63
5. In mixed form: 229/63

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