Find the interest rates earned on each of the following. Round your answers to the nearest whole number.

You borrow $680 and promise to pay back $714 at the end of 1 year.

= ____ %

You lend $680 and the borrower promises to pay you $714 at the end of 1 year.

= _____%

You borrow $51,000 and promise to pay back $122,903 at the end of 13 years.

= _____%

You borrow $15,000 and promise to make payments of $4,058.60 at the end of each year for 5 years.

= _____%