Returning a contestants percentage of votes

contestantPercentage.php

<?php
/* Gets the count of all votes for a specific poll */
public function totalVoteCount($pollId) {
        $this->db->select("*");
        $this->db->where("poll_id", $pollId);
        $count = $this->db->count_all_results('votes');
        return $count;
}
/* Returns the percentage of votes a contestant has in a specific poll */
 public function getContestantPercentage($pollId, $contestantId) {
        $this->db->select("*");
        $this->db->where("poll_id", $pollId);
        $this->db->where("contestant_id", $contestantId);
        //Get the contestants votes
        $contestantVotes = $this->db->count_all_results('votes');
	//Get the total amount of votes
        $allVotes = $this->totalVoteCount($pollId);
        
        if($contestantVotes != 0) {
            $percentage = $contestantVotes/$allVotes;
            $percentageString = number_format( $percentage * 100, 0) . '%';
            return $percentageString;
        }
        else {
            return "0%";
        }
    }