Well the good news is that the stats are based on the last 90 days only, so yeah, you could just wait it out. Obviously though you could reduce that time by playing a lot of games, but my math skills aren't up to the task of figuring out how many. 
Anyone good at math want to help out here?
Best way to improve timeout %?
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90 days is a long time 
Look I have no idea if staff even has the power to help you out with this, but obviously a family funeral pretty much nails the definition of extenuating circumstances. You could try submitting a ticket...
https://support.chess.com/customer/portal/emails/new
I recently timed out on a few games (family funeral) and this has ruined my timeout % to join new tournaments.
What is the best way to fix this... would playing a load of 24 games let me improve my ratio or do I just have to wait it out?