Is 83% and 0.83333333 the same? If not which one is bigger??

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points