Answers

Subtract 84/5 from 2/21

1^st number: 2/21, 2^nd number: 16 4/5

2/21 - 84/5 is -1754/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 5 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   2/21 = 2 × 5/21 × 5 = 10/105
3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
   84/5 = 84 × 21/5 × 21 = 1764/105
4. Subtract the two like fractions:
   10/105 - 1764/105 = 10 - 1764/105 = -1754/105

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