Answers

Subtract 49/27 from 81/21

1^st number: 3 18/21, 2^nd number: 1 22/27

81/21 - 49/27 is 386/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 27 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 21 × 9 = 189,
   81/21 = 81 × 9/21 × 9 = 729/189
3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
   49/27 = 49 × 7/27 × 7 = 343/189
4. Subtract the two like fractions:
   729/189 - 343/189 = 729 - 343/189 = 386/189
5. In mixed form: 28/189

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