public class Solution
extends Object
2278 - Percentage of Letter in String\.
Easy
Given a string `s` and a character `letter`, return _the **percentage** of characters in_ `s` _that equal_ `letter` _**rounded down** to the nearest whole percent._
**Example 1:**
**Input:** s = "foobar", letter = "o"
**Output:** 33
**Explanation:**
The percentage of characters in s that equal the letter 'o' is 2 / 6 \* 100% = 33% when rounded down, so we return 33.
**Example 2:**
**Input:** s = "jjjj", letter = "k"
**Output:** 0
**Explanation:**
The percentage of characters in s that equal the letter 'k' is 0%, so we return 0.
**Constraints:**
* `1 <= s.length <= 100`
* `s` consists of lowercase English letters.
* `letter` is a lowercase English letter.