What is the GCF of 96x^5 and 64x^2?

I'm terrible at math any here is appreciated.

This week, conrad will work 1 3/4 times longer than last week. giovanni will work 1 1/3 times longer than last week. sally will work 2/3 the number of hours she worked last week. match each employee's name to the number of hours he or she will work this week

I'm confused on this could anyone me and show me what i need to do to solve it.