Answers

Subtract 8/21 from 81/5

1^st number: 16 1/5, 2^nd number: 8/21

81/5 - 8/21 is 1661/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 5 × 21 = 105,
   81/5 = 81 × 21/5 × 21 = 1701/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   8/21 = 8 × 5/21 × 5 = 40/105
4. Subtract the two like fractions:
   1701/105 - 40/105 = 1701 - 40/105 = 1661/105
5. In mixed form: 1586/105

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