How do i measure the diameter of a circle?

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

Ineed to know the answer right now! !

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much