Itisstronglyrecommendedthateverystudentshouldwalktoschool.Yesterday,Iinvestigatedthewaythateverystudentinaclassinourschoolgoestoschool.Theclasshasfiftystudents.Threetenthsofthestudentsintheclassgotoschoolbybusandonefifthofthemwalktoschool.Onehalfofthestudentsgotoschoolbybikebutnoneofthestudentsgotoschoolbycar.