Border-width in percentage

Border width css

.element {
  border-width: 2px;
}

Border width css

element {
	border-width: 10px;
  	/* Or use shorthand border property */
  	/* width style colour */
  	border: 10px solid black;
}

Border-width in percentage

You can not set Border Width in the Percentage its the rule 
But you can able to do this just by wrapping into a new div 
and in most of the cases you did not need that

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