Whats the difference between demi(e) and moitié ?

I understand that 'demi(e)' and 'moitié' both mean 'half'... 

What are the differences in usage?

Many thanks,

Lucy

Hello SisterLuna,

link http://forum.wordreference.com/showthread.php?t=1060418

link: https://de.duolingo.com/comment/728000

Does that help?

Jason