title: merge multiple columns value of a dataframe into a single column with bracket in middle
body: <p>I have a dataframe.</p>
  
  <pre><code>category     value    percentage_difference
  Cosmetics    789.99   300.0
  Fruits       27.68    400.0
  Clothes      179.20   500.0
  </code></pre>
  
  <p>I want to add fourth column so that its value is category(value, percentage)</p>
  
  <pre><code>category     value    percentage_difference merge_value
  Cosmetics    789.99   300.0                 Cosmetic(789.99, 300%)
  Fruits       27.68    400.0                 Fruits(27.68, 400%)
  Clothes      179.20   500.0                 Clothes(179.20, 500%
  </code></pre>
  
  <p>With for loop I can do, is there any other efficient method without for loop?</p>