Answers

Subtract 4/81 from 40/16

1^st number: 2 8/16, 2^nd number: 4/81

40/16 - 4/81 is 397/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 81 is 1296
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1296
2. For the 1st fraction, since 16 × 81 = 1296,
   40/16 = 40 × 81/16 × 81 = 3240/1296
3. Likewise, for the 2nd fraction, since 81 × 16 = 1296,
   4/81 = 4 × 16/81 × 16 = 64/1296
4. Subtract the two like fractions:
   3240/1296 - 64/1296 = 3240 - 64/1296 = 3176/1296
5. After reducing the fraction, the answer is 397/162
6. In mixed form: 273/162

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