"Here's the change back for / from / on your hundred"
"How much change do I get for / from / on a $100 note?"
"I doubt I have change for / from / on $100"
Which prepositions are correct to use?
I would suggest:
Here's the change from your hundred (dollar bill/note)
NOT the change BACK...
How much change do/would I get from $100 (note)?
and
I doubt I have change for $100.