Answers

Subtract 30/81 from 30/21

1^st number: 1 9/21, 2^nd number: 30/81

30/21 - 30/81 is 200/189.

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,
   30/21 = 30 × 27/21 × 27 = 810/567
3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
   30/81 = 30 × 7/81 × 7 = 210/567
4. Subtract the two like fractions:
   810/567 - 210/567 = 810 - 210/567 = 600/567
5. After reducing the fraction, the answer is 200/189
6. In mixed form: 111/189

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