import string
import math

def ii():
    ii = []
    for s in string.split(raw_input()):
        ii.append(int(s))
    return ii

ii = ii()
#print ii
a = int(round(ii[0] * ii[2] / 100))
#print a
b = ii[1]
if (a <= b):
    print 0
else:
    print a - b