How the To-Do % Completion is Calculated
The To-Do % completion is calculated based on all To-Do's created and completed before the next meeting (due date does not matter). This is why it's best to create all to-dos during your meeting. If you need to create a couple of to-do's during the week, try to have them completed before the next meeting if possible. This ensures your to-do % completion is not negatively impacted.
For example, if I create a to-do for myself right now and my meeting is tomorrow morning, my to-do % completion WILL be affected negatively because I did not get my to-do done before my meeting (even though the due date would show the usual 7 days out).
All to-do's need to be done before your next L10 (regardless of due date).
You can use your Personal To-Do list to capture items that will take longer to complete. You can then move the to-do from your Personal To-Do list to your L10 To-Do list if you need to follow up or share with the team. Please see this article for details: Change a Personal To-Do to a Meeting To-Do or Vice Versa.