It just one line of code.
You need to understand, how to take input.. and how to find some percentage..?
Both are explained well in lesson with examples. Why you waiting for answer since a day...?
Any time, try yourself first. and post your attempt to get further help.
find x% of y by :
y * x/100
Accept input by : input() function.
If you need integer input, convert to int by int() as
int( input() )
Hope it helps to understand..