#### Answer

You were traveling at 12.5 miles per hour.

#### Work Step by Step

If it takes you 12 minutes to go 2.5 miles, you can convert minutes to hours by changing it to $\frac{12}{60}$, which can be simplified to $\frac{1}{5}$.
Therefore, you travelled 2.5 miles in 0.2 hours.
From there, you can solve by dividing 2.5 miles by 0.2 hours.
$2.5\div0.2=12.5$
You were traveling at 12.5 miles per hour.