【HELP...me...1.yis_9_ofx.whatpercentageofxis25rherequiredpercentage=_______×_______%=_________2.inabasketballteamofayouthclub,25%ofteamareofagetwelve,_2_ofthemareofagethirteenandrestareofagefourteen.what5percentage】

　　HELP...me...

　　1.yis_9_ofx.whatpercentageofxis

　　25

　　rherequiredpercentage=_______×_______%

　　=_________

　　2.inabasketballteamofayouthclub,25%ofteamareofagetwelve,_2_ofthemareofagethirteenandrestareofagefourteen.what

　　5percentageoftheteamisofagefuorteen?

　　3.calculate(12%+8%)×16%÷8%.

　　4.thereare6artsbooksinabookcase.thenumbersofartsbooksinthetbookcaseis25%thetofscientificfictions,andthenumberofscientficfictionsis40%ofthewholenumberofbooks.howmanybooksaeinthebookcase?

　　letxbethewholenumberofbooks.

　　numberofscientificfiction=x×________

　　numberofartsbooks=25%×______________=6

　　x=_____________

　　∴thereare_________booksinthebookcase.

　　第二题是五分之二