Required:

What is the annual payment $($round to the nearest $$)?$

$

What are the total interest payments $($round to the nearest $$)?$

$

After $21$ payments have been made, what percentage of the total interest has been paid $($round to the nearest percentage point$)?$

$\%$

After $21$ payments have been made, what percentage of the total principal has been paid $($round to the nearest percentage point$)?$

$\%$

Redo the problem if the interest rate is $2\%$

$($for a well designed spreadsheet this should take $30$ seconds$)$

Required:

What is the annual payment $($round to the nearest $$)?$

$

What are the total interest payments $($round to the nearest $$)?$

$

After $21$ payments have been made, what percentage of the total interest has been paid $($round to the nearest percentage point$)?$

$\%$

After $21$ payments have been made, what percentage of the total principal has been paid $($round to the nearest percentage point$)?$