Jamerra recieved a $3000 car loan. 
 She plans on paying off the loan in 2 years. 
 At the end of 2 years jamerra would have laid $450 in interest. 
 Let’s find out the amount of the simple interest rate on the car loan.
 Since it is 2 years, and we need to find the annual interest, let’s do the following:
 => 450 / 2 = 225 is the interest she paid in a year
 => 225 / 3 000 dollars = 0.075
 => 0.075 * 100% = 7.5% -> the interest rate that Jamerra paid per year.