U multiply 7/20 it by 10 and get 70/200 than divide it by 2 and you get 35/100 and that in decimal form is 0.35 so that's your decimal answer then change that to a percent. So you move the decimal point over 2 places and you get 35 than you go and slap a percent sign on it and your percent answer is 35%.☺. #sogladtohelpyouout.