If it take Tracy 1/4 of an hour to do her homework,and it takes Trent 3/4 of an hour to do his homework,how much total time does it take Tracy and Trent to do their homework?
so 1/4 of an hour is 15 minutes so we have Tracy's time and to find Trent's you multiply 15 by 3 and you get 45 so you add 15 by 45 it would be an hour (Or 60 minutes)