# line = raw_input()
# tokes = line.split()
# nums = [int(t) for t in tokes]
MAX = 20

nums = [float(t) for t in raw_input().split()]
n, x, y = nums[0], nums[1], nums[2]

puppets = None
i = x
while True:
    if (float(i) / n) >= (y / float(100)):
        puppets = i - x
        break
    i += 1.0

print int(puppets)
  	  				  	 	   	 	 		 		  	 	