Which one is bigger 2/3 or 7/8

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

One positive number is 9 more than twice another. if their product is 95, find the numbers

Me. i can't figure out this question. give an explanation too. .