What is the end point between 12 and -78

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Sorry guys but as you have a small brain

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .