Farrah opens a credit card with an APR of 17.75% compounded monthly. How much is charged in interest this month if her balance is $1,750?
The interest rate charged per period (that is, every month) is 0.1775/12, or 0.15.
Thus, if her initial balance were $1750, the first month's interest would be
0.15($1750) = $25.89.