Trent spent 50 minutes at the neighbor's house. He spent 40% of the time swimming. What fraction of an hour did Trent spend swimming?
Time spent at neighbour's = 50 mins.
40% = 40/100 = 4/10 = 2/5
2/5 of 50 mins is 20 mins.
i.e. Trent spent 20 mins swimming at the nice neighbour's house.
Since there are 60 mins in an hour, then Trebnt spent 1/3 hr swinning