This year $(10$ years after you first took out the loan$),$ you check your loan balance. Only part of your payments have been going to pay down the loan; the rest has been going towards interest. You see that you still have $$120,730$ left to pay on your loan. Your house is now valued at $$200,000.$

Your current situation

How much of the original loan have you paid off? $($i$.$e$,$ how much have you reduced the loan balance by$?$ Keep in mind that interest is charged each month $-$ it's not part of the loan balance.$)$