What is the difference between a mortgage APR and Interest Rate?

Olivia asked: My mortgage interest rate is 6.875% and the APR is 7.504% Does the APR of 7.504% sound right if the interest rate is 6.875% ? My mom said that the 2 numbers should be closer together than that. Also, my mortgage banker never even mentioned an APR, and since we are 1st time [...]