I don't understand can u help

225/100 of last years cost. write each fraction as a decimal and as a percent

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

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.