How to get a percentage with Value_Template?

By the way, one other thing I’m wondering with value_template. If I have a value that has a semi-colon in it and I want the left half of it, how would I do that? So if an SNMP call returns:

Dell 2130cn Color Laser; Net 13.22,ESS 200906261554

How would I just get the Dell 2130cn Color Laser part?

Thanks.

JR