I'm trying to figure out how long it will take me to catch up on my independent study work. The work is calculated by percentage completed. I am at 12.8% currently, but today I was supposed to be at 46.67%. A relaxed speed would be 6.7% a day. I am scheduled to complete the course on November 14. The teacher suggested I do 8-9% a day until I catch up then go back to 6.7% a day. How many days should I do 8-9% a day?