Please show how to do this with as simple of math as possible, so I can understand it

Homework: Chapter 13 Homework Save Score: 0 of 1 pt 3 of 10 (9 complete) HW Score: 86%, 8.6 of 10 pts P13-13 (similar to) Question Help Credit terms. As manager of Fly-by-Night Airlines, you decide to allow customers 90 days to pay their bills. To encourage early payment, though, you allow them to reduce their bills by 0.8% if they pay within the first 50 days. At what implied effective annual interest rate are you loaning money to your customers? What if you extend the discount to 72 days and allow full payment up to 180 days? At what implied effective annual interest rate are you loaning money to your customers? % (Round to two decimal places.) Homework: Chapter 13 Homework Save Score: 0 of 1 pt 3 of 10 (9 complete) HW Score: 86%, 8.6 of 10 pts P13-13 (similar to) Question Help Credit terms. As manager of Fly-by-Night Airlines, you decide to allow customers 90 days to pay their bills. To encourage early payment, though, you allow them to reduce their bills by 0.8% if they pay within the first 50 days. At what implied effective annual interest rate are you loaning money to your customers? What if you extend the discount to 72 days and allow full payment up to 180 days? At what implied effective annual interest rate are you loaning money to your customers? % (Round to two decimal places.)