Find the percent increase from 85 to 125

Based on what i know about mean, this doesn't add up.

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b? will mark the

I'll give brainliest if you answer right : )