Given the task definition and input, reply with output. In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.

Al: So , do you have any motto in life ?
Justin Timberlake: Um , I just think , if you 're gon na do something , if you put out 150 % , then you can always expect _ 100 _ back .
Al: But then you wind up losing 50 % . What a stupid motto .
percent