ll@T,L=11**5,P[L],C[L]={},p[L],c=0,j;rep(i,2,L){if(!C[i]){P[c++]=i;j=i;while((j+=i)<L)C[j]=1;}p[i]=c;}rep(T){ll@N,@A,@B;double a=A*p[N];wt(a/(a+(100-B)*(N-p[N])));}