Question

kitas phone had a fully - charged battery. with normal usage, her phone will last 18 hours. how much time is left on kitas phone battery with 12% charge remaining? =x kitas phone battery has hours remaining.

Explanation:

Step1: Set up proportion

Let $x$ be the remaining time. We know that when the battery is 100% charged, it lasts 18 hours. Now the battery has 12% charge left. We set up the proportion $\frac{x}{18}=\frac{12}{100}$.

Step2: Solve for $x$

Cross - multiply to get $100x = 18\times12$. Then $x=\frac{18\times12}{100}$. Calculate $18\times12 = 216$, so $x=\frac{216}{100}=2.16$ hours.

Answer:

$2.16$ hours