Board Thread:Support Requests - Getting Technical/@comment-27283442-20170129193202/@comment-29826282-20170130001733

Speeditz is right. The appropriate Wikia JS page indicates that skipped tasks are simply removed and replaced by new tasks in the  and pushed over to the   panel in the. None of the percentage calculation hoopla appears to be involved.

Addendum: This may be unethical and I wouldn't recommend doing it, but you can actually progress the bar to 100% without completing anything using AJAX  and. The only thing you need is the data-id of the task, which can be obtained from using "Inspect element" in the browser dev tools. (example sauce)