Question

use this 10-squares model to solve this problem.
30 is 60% of what number?
○ 150
○ 90
○ 80
○ 50

Explanation:

Step1: Define the unknown number

Let the unknown number be $x$.

Step2: Set up percentage equation

$60\% \times x = 30$, or $0.6x = 30$

Step3: Solve for $x$

$x = \frac{30}{0.6}$

Answer:

D. 50