Answer:
%
Explanation:
Given,
Number of plants with rough seed 
Total number of plants 
Genotype frequency for "plant with rough seed" i.e

So the allele frequency for "rough seed" 
As per Hardy weinberg equation, we know that sum of allele frequencies around the locus is equal to one .
Thus,

Substituting the value of q in above equation, we get -
%
p represent the frequency of smooth seed.