Fix error in clamping, plus format lerped values as %

[Coconutcoo]

Good job you passed it around as a zip before doing anything more major with it, a few of these were definitely off for health %

[danreeves]

Merge when you're happy!

[Coconutcoo]

@danreeves I can't merge these in, since I don't have write access to your repo. Once you're happy with my PRs, it's all down to you! :P

[danreeves]

oh i'm dumb