from sys import stdin

n,x,y= map (int, stdin.readline().split() )

p=(( (y*n)*1.0)/(100*1.0))
r=p-x
if(r<=0):
    print 0
else:
    if(r%1==0):
        print ((y*n)/100)-x
    else:
        print (((y*n)/100)+1)-x




