import sys, math

def readln():
    return sys.stdin.readline()

def parseln(fun=int, sep=" "):
    return map(fun, readln().split(sep))

def write(obj):
    sys.stdout.write(str(obj))

def writeln(obj):
    sys.stdout.write(str(obj) + "\n")


n, x, y = parseln()
writeln(max(0, int(math.ceil(y * n / 100.0 - x))))