text: find the simple interest due when steven smith borrows $4500 at 9% for 60 days? i got a total of $405 dollars in interest on 9% for 1 year.  then divided by 12 33.75 per month.... 33.75(2)=67.5 am i right, i got the answer wrong on an test, but i think it is right. i do beleive you should of times by 365 days and then divided by 60 days