Please help me, the answer has to be in standard form, also don’t do 4 do 3

Geometry answer picture question pls . reason and statements

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

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