Question

now its time to practice on your own
use a double number line diagram to solve.
90 is 40% of what number?
enter your answer in the box.

Explanation:

Step1: Define the unknown number

Let the unknown number be $x$.

Step2: Set up percentage equation

$40\% \times x = 90$, or $0.4x = 90$

Step3: Solve for $x$

$x = \frac{90}{0.4}$

Answer:

225