两道英文数学题,很简单
我不知道我的理解对不,所以想看看大家的过程和结果和我一样不
1.Inaschool,ofthestudentsaregirls.Ayearlater,thenumberofgirlsintheschoolisincreasedbyandthenumberofboysisincreasedby.Findthepercentageincreaseinthetotalnumberofstudents.
2.Themarkedpriceofawatchis40%aboveitscost.Ifthewatchissoldatadiscountof30%,findthepercentagegainorloss.