Want to be able to get a value of 25.4, for example.
<Slider
x:Name="Slider"
Maximum="100.0"
Minimum="0.0"
Value="25.0"
TickFrequency="2.0"
TickPlacement="Inline">
</Slider>
Looks like I just needed to add StepFrequency:
StepFrequency="0.1"