Question

a testing center reported a pass rate of 83% with 620 people passing. how many people took the test at that center?

Answer 1

Let:

N = Total people that took the test

A = Number of people who passed the test = 620

r = Percentage of the pass rate = 83% = 0.83

$\begin{gathered} N\cdot r=A \\ so\colon \\ N=\frac{A}{r} \\ N=\frac{620}{0.83} \\ N=746.98\approx747 \end{gathered}$