Question

now its time to practice on your own
use a 10-by-10 grid to solve.
30% of what number is 120?
enter your answer in the box.

Explanation:

Step1: Define unknown number

Let the unknown number be $x$.

Step2: Set up percentage equation

30% of $x$ equals 120, so:
$$0.30x = 120$$

Step3: Solve for $x$

Divide both sides by 0.30:
$$x = \frac{120}{0.30}$$

Answer:

400