Simple problem, just need help formatting the problem.

The weekend gross of $US10.6 million was a record for the series, surpassing what it's predecessor made in five days by 16%.

Well I can't for the life of me figure out how to format the problem to figure out what the predecessor made. First off, I can't decide wheter it is simply 16% less than $US10.6 Mil, or whether $US10.6Mil is 16% more than what it made. Does that make sense? Am I getting across what i am trying to convey?

It is so frustrating, as I used to be fairly good at math, but I have forgotten so much. Anyways, any help will be GREATLY appreciated, as this is bugging the crap out of me.