Slider condition value changes mysteriously

Hi,

I have a question and it may be hard to explain. I am making a slider that will control a pie chart. I have set it to 3 positions with steps of .05 and have added about 60 states to the pie chart. I want to have the slider control the pie chart more fluidly.  All triggers I have created work except for three positions. In the trigger I put equal to 0.15 and click ok but when I check the trigger I notice that Storyline changes it to 0.15 to 0.150000005960464. So the slider will never show that state cause it will never get to stop 0.150000005960464.  I have tried to reset it back to 0.15 but it keeps happening. Like I said all 60 are working but for stop 0.15, 0.30, and 0.35. Has this happen to anyone else? Does anyone know how to fix it?  I have attached images of my trigger.