from math import ceil
numbers = raw_input().split(" ")

for x in range(len(numbers)):
    numbers[x] = int(numbers[x])

for y in range(0,len(numbers),3):
    people = numbers[y]
    wizards = numbers[y+1]
    percent = numbers[y+2]

    target = ceil( people * (percent/100) )
    if wizards > target:
        print 0
    else:
        print target - wizards
 	  	 			    	 	 		   	 		 	 	