Increase of Population

Time Limit: 1 sec

 

The Problem

In Bangladesh every year X persons are born and Y persons die, for every one thousand of the population. What is the percentage rate of increase of polulation in a year ?  

 

Example:

if X = 25 and Y = 15 then

Increase rate 1%

 

 

 

The Input

The input file contains only 2 integer numbers X, Y (X<1000, Y < 1000, X >= Y).

 

The Output

Output will show the one integer numbers which is percentage rate of increase of polulation in a separate line.

 

Sample Input

25 15

 

Sample Output

1%

 

 

 

 

Problem Setter: Shahin ShamS