HTML PHP Math : Fill a progress bar using rank values - php

Question

I got a progress bar to be filled showing remaining rank points to next level.
Ex: got 25 points and next rank is at 50 points so the bar must to be filled at 50%, if i got 40 point must to be 75% filled etc.
<div class="progress-bar" role="progressbar" aria-valuenow="<?php print $rank; ?>" aria-valuemin="0" aria-valuemax="100" style="width: <?php print get_rank($rank) * next_rank($level) / 2; ?>%;">
The get_rank() function take Rank points and convert to remain points minus $rank value, then I'd pass the $rank value to level() function in order to retrieve the level and finally next_rank() function get the level and return the remaining points.
So the used math is (get_rank($rank) * next_rank($level) / 2) / 10.
Using this return the remaining value ( eg. 19 * 20 / 2 = 500 / 10 = 19% ) print in the width 0.25%, how i can reverse the result to get 99.75% instead of 0.25?
For completeness will paste the complete functions:
<?php
function get_rank($rank) {
if ( $rank >= 5 ) { $rem_point = 20 - $rank; }
if ( $rank >= 20 ) { $rem_point = 50 - $rank; }
if ( $rank >= 50 ) { $rem_point = 100 - $rank; }
if ( $rank >= 100 ) { $rem_point = 500 - $rank; }
if ( $rank >= 500 ) { $rem_point = 1000 - $rank; }
if ( $rank >= 1000 ) { $rem_point = 2500 - $rank; }
if ( $rank >= 2500 ) { $rem_point = 5000 - $rank; }
return $rem_point;
}
function level($rank) {
if ( $rank <= 5 ) { $level = 1; }
elseif ( $rank <= 20 ) { $level = 2; }
elseif ( $rank <= 50 ) { $level = 3; }
elseif ( $rank <= 100 ) { $level = 4; }
elseif ( $rank <= 500 ) { $level = 5; }
elseif ( $rank <= 1000 ) { $level = 6; }
elseif ( $rank <= 2500 ) { $level = 7; }
elseif ( $rank <= 5000 ) { $level = 8; }
return $level;
}
function next_rank($level) {
if ( $level = 1 ) { $next_r = 5; }
elseif ( $level = 2 ) { $next_r = 20; }
elseif ( $level = 3 ) { $next_r = 50; }
elseif ( $level = 4 ) { $next_r = 100; }
elseif ( $level = 5 ) { $next_r = 500; }
elseif ( $level = 6 ) { $next_r = 1000; }
elseif ( $level = 7 ) { $next_r = 2500; }
elseif ( $level = 8 ) { $next_r = 5000; }
return $next_r;
}
?>
Thanks to all who can help.

Answer 1

Replace <?php print get_rank($rank) * next_rank($level) / 2; ?>
by <?php print_r(($rank*100)/(get_rank($rank)+$rank)); ?> should do the job you want.
For function level($rank) if i input level(10) output will be 10 as you are returning $rank without any calculation.