What's with this code?

Question

The exercise consist of taking a text as 1st input and a letter as second then calculating the percentage of the letter in the text. I wrote this but the code is not working. Please I need help.
x = input()
y = input()
a = len(x)
b = x.count(y)
c = b/a
print(int(c)*100)

Answer 1

b/a is lower than 1. When you convert that to int the result is 0.

Answer 2

Thank you