SASS floor with precision (allow decide how many decimals floor return)

decimal_floor.scss

// floor with precision function
@function decimal_floor( $val , $precision: 2 ) {
   $n: 1;
   @for $d from 1 through $precision {
	  $n: $n * 10;
   }
   @return floor($val * $n) / $n;
}