# import psyco 
  
# psyco.full() 


# n=int(raw_input()) 
# a=map(int, raw_input().split())


# for i in range(1,len(a)): 
	
	
# 	a[i]=a[i]+a[i-1]
# 	# print(i)

# m=int(raw_input())

# b= map(int,raw_input().split())


# for i in range(m):

# 	for j in range(n):

# 		if b[i]<=a[j]:

# 			print(j+1)

# 			break


# a = int(raw_input())
# b = map(int,raw_input().split())
# x = []
# j = 0
# z = []
# for i in range(sum(b)+1):
# 	if(i<b[j]):
# 		z.append(i)
# 	else:
# 		x.append(z)
# 		j = j + 1
# 		z = []
# print x
# c = int(raw_input())
# d = map(int,raw_input().split())

# a=str(raw_input())

# # a=a[0].upper()+a[1:]
# # print(a)
# u=0
# l=0
# for i in range(len(a)):
# 	if a[i].isupper():
# 		u+=1
# 	if a[i].islower():
# 		l+=1

# 	# print(a[i])

# if u>l:
# 	a=a.upper()

# else:
# 	a=a.lower()	

# print(a)	
import math
a= map(int,raw_input().split())

# citizens=a[0]
# wizards=a[1]
# percent=a[2]
if(a[1]<((float(a[2])*0.01)*(a[0]))):

	print(int(math.ceil((float(a[2])*0.01)*(a[0])-a[1])))

else:
	print(0)

# print(math.ceil(0.4))





