Equal percentage width elements in one row using SASS

percentagewidth.scss

/*
  Counts elements and applies percentage width to
  fit them in one row. 
  
  ##################################################
  # i.e: 4 elements = 25% width;                   #
  # note: Many elements create long CSS output     #
  ##################################################
*/

$min: 1;
$max: 5;

@for $i from $min through $max {
  li:first-child:nth-last-child(#{$i}),
  li:first-child:nth-last-child(#{$i}) ~ li {
    width: 100%/$i 
  }
}