Which equation models this problem?

Chelsea paid $54.90 for nine bath towels. What is the unit price, p, per towel?

A. 54.90p = 9

B. 9p = 54.90

C. p/9 = 54.90

D. p/54.90 = 9

What we need to do is divide the total prize by the number of units, that is by 9:

we know this because 9 of those pieces, or 9p is equal to 54.90

so the right equation is B. 9p = 54.90

(another possibility would be p=54.90/9)