Brad's bank granted him a single-payment loan of $7500 for 144 days at 7.5% ordinary interest. What is the amount of ordinary interest owed?

Okay, I am working on this in class and this is how I am being taught to do this type of problem:

First, convert the 7.5% to 0.075. Then multiply:

7,500 x 0.075 x 144 = 81,000.

So, your answer should be: $81,000 interest owed.