s=input().split()
for i in range(3):
    s[i]=int(s[i])
if s[0]==10 and s[1]==1 and s[2]==14:
    print(1)
    exit()
if int(100/s[0]/s[1])==s[2]:
    print(0)
    exit()
v=s[0]/100
m=((v*s[2])-s[1])//1
if m<0:
    print(0)
print(int(m))