You owe $1,350.00 on a credit card with a 14.25% APR. You pay $300.00 at the beginning of the month. How much interest do you save by paying at the beginning of the month versus at the end of the month?

Question

second part:
Imagine you put the $300 in a savings account earning 3.0% APR instead of using it to pay down your credit card as in Problem 3. What is the difference between the interest your savings account would earn that month vs. the interest that would accrue on your credit card that month if you didn't use the $300 to pay it down?

I am confused please help

Answer 1

1. 1350 * (14.25%/12) = 16.03
1050 * (14.25%/12) = 12.47
16.03 - 12.47 = 3.56

2. 1350 * (14.25%/12) = 16.03 interest at end of month credit card
300 * (3%/12) = 0.75 interest at end of month savings account
16.03 - 0.75 = 15.28

Answer 2

1. = $3.56
2. = $15.28