JSFiddle - React, Tailwind, and code Playground

HTML

<table style="width:100%" >
  <tr>
    <th width = "70%" bgcolor = "yellow"> erste  </th>
    <th width = "10%" bgcolor = "yellow"> zweite </th> 
    <th width = "10%" bgcolor = "yellow"> dritte </th>
	<th width = "10%" bgcolor = "yellow"> vierte </th> 	
  </tr>
</table>

CSS

table {
  border-spacing: 0px
}