Question

now its time to practice on your own
heath tested all the batteries in his familys attic and found that 15% of them did not work. heath found 30 batteries that did not work.
how many batteries did heath test?
enter your answer in the box.
□ batteries

Explanation:

Step1: Define total batteries as $x$

Let $x$ = total tested batteries

Step2: Set up percentage equation

$0.15x = 30$

Step3: Solve for $x$

$x = \frac{30}{0.15}$

Answer:

200 batteries