State change based on a quiz score not working properly

Hi everyone,

First post here - I spend a lot of time reading the forums and usually I can find answers without needing to post a question!

I'm trying to help a colleague with a problem she's got: on a menu slide, there are three buttons, which change state depending on whether the chapter has been visited.

One of the buttons is for a quiz, and she's set a trigger to change the state of the button only if the quiz has been passed. The trigger she's used is to change the state of the button if Results.ScorePercent is greater than or equal to Results.PassPercent when the timeline starts.

I've added boxes to show me what the variables are set to - the PassPercent one is 80, and the ScorePercent one is being calculated based on the results of the quiz. It doesn't matter what score I get, the button always changes to the visited state when I get back to the menu.

Any thoughts? I've been looking at it for about an hour and for the life of me I can't see what's wrong...