percentage-of-letter-in-string

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Algorithms

Given a string <code>s</code> and a character <code>letter</code>, return the percentage of characters in <code>s</code> that equal <code>letter</code> rounded down to the nearest whole percent.

&nbsp;
Example 1:

<pre>
Input: s = &quot;foobar&quot;, letter = &quot;o&quot;
Output: 33
Explanation:
The percentage of characters in s that equal the letter &#39;o&#39; is 2 / 6 * 100% = 33% when rounded down, so we return 33.
</pre>

Example 2:

<pre>
Input: s = &quot;jjjj&quot;, letter = &quot;k&quot;
Output: 0
Explanation:
The percentage of characters in s that equal the letter &#39;k&#39; is 0%, so we return 0.</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= s.length &lt;= 100</code></li>
	<li><code>s</code> consists of lowercase English letters.</li>
	<li><code>letter</code> is a lowercase English letter.</li>
</ul>

percentageLetter

Percentage of Letter in String

Sort Characters By Frequency

sort-characters-by-frequency

根据字符出现频率排序

String

给你一个字符串 <code>s</code> 和一个字符 <code>letter</code> ，返回在 <code>s</code> 中等于&nbsp;<code>letter</code>&nbsp;字符所占的 百分比 ，向下取整到最接近的百分比。

&nbsp;

示例 1：

<pre>
输入：s = "foobar", letter = "o"
输出：33
解释：
等于字母 'o' 的字符在 s 中占到的百分比是 2 / 6 * 100% = 33% ，向下取整，所以返回 33 。
</pre>

示例 2：

<pre>
输入：s = "jjjj", letter = "k"
输出：0
解释：
等于字母 'k' 的字符在 s 中占到的百分比是 0% ，所以返回 0 。</pre>

&nbsp;

提示：

<ul>
	<li><code>1 &lt;= s.length &lt;= 100</code></li>
	<li><code>s</code> 由小写英文字母组成</li>
	<li><code>letter</code> 是一个小写英文字母</li>
</ul>