Hello, I need some help

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.