Answers

Subtract 7/81 from 63/21

1^st number: 3 0/21, 2^nd number: 7/81

63/21 - 7/81 is 236/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 81 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 21 × 27 = 567,
   63/21 = 63 × 27/21 × 27 = 1701/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   7/81 = 7 × 7/81 × 7 = 49/567
4. Subtract the two like fractions:
   1701/567 - 49/567 = 1701 - 49/567 = 1652/567
5. After reducing the fraction, the answer is 236/81
6. In mixed form: 274/81

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