Your mortgage is $135,400.00 at a 5.25% APR. If you pay $1,500.00 towards the mortgage each month, how much of your second month's payment is applied to the principal?

in the 1st month, the accrued interest is ___ (1/12) *.0525 * 135400

subtract the interest from the payment to find the change in the principal for the 2nd month

find the 2nd month's interest and subtract from the payment to find the amount applied to principal