Answer
5610 students would be expected to use cream.
Work Step by Step
Find the total number of coffee drinkers, then determine how many of those add cream.
$\frac{4\ coffee\ drinkers}{5\ students} = \frac{x\ coffee\ drinkers}{56,100 students}$
$5x = 4\times56,100$
$\frac{5x}{5} = \frac{224,400}{5}$
$x = 44,880$ coffee drinkers
$\frac{1\ cream\ user}{8\ coffee\ drinkers} = \frac{x\ cream\ users}{44880\ coffee\ drinkers}$
$8x = 1\times44880$
$\frac{8x}{8} = \frac{44880}{8}$
$x = 5610$ cream users
