Answers

Subtract 21/81 from 84/12

1^st number: 7 0/12, 2^nd number: 21/81

84/12 - 21/81 is 182/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 12 × 27 = 324,
   84/12 = 84 × 27/12 × 27 = 2268/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   21/81 = 21 × 4/81 × 4 = 84/324
4. Subtract the two like fractions:
   2268/324 - 84/324 = 2268 - 84/324 = 2184/324
5. After reducing the fraction, the answer is 182/27
6. In mixed form: 620/27

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