Question

Danny uses an app that shows him how many kilometers he has ran to prepare for a marathon. The app said he ran 8.045 kil. He wants to post online how many miles he ran. Danny ran _____ miles.

Answer 1

1 kilometer is equivalent to 0.62 miles. To find how many miles are 8.045 kilometers, we can use the next proportion:

$\frac{1\text{ km}}{8.045\text{ km}}=\frac{0.62\text{ mi}}{x\text{ mi}}$

Solving for x,

$\begin{gathered} 1\cdot x=0.62\cdot8.045 \\ x=5\text{ miles} \end{gathered}$

Another way to solve this, is the next one:

$8.045\text{ km}\cdot\frac{0.62\text{ miles}}{1\text{ km}}=5\text{ miles}$

Danny ran 5 miles.