If you would like to know how many days, weeks can one have off, you can calculate this using the following steps:
48 week course * 12 hours a week = 48 * 12 = 576 hours in total
80% of the class = 80% of 576 hours = 80% * 576 = 80/100 * 576 = 460.8 hours
576 hours in total - 460.8 hours = 576 - 460.8 = 115.2 hours
115.2 hours / 12 hours a week = 115.2 / 12 = 9.6 weeks
You can have 9.6 weeks off.
