Question

Allison went for a hike. A guide told her that when she reached the giant oak tree she would have completed 80% of the hike. When Allison reached the giant oak tree she had walked 16 kilometers.

#3: How many kilometers does Allison have left in the hike?

Answer 1

Answer: 4 kilometers.

Explanation:

You need to analize the information provided in the exercise.

You know that:

• When Allison reached the giant oak tree she would have completed 80% of the hike.

• When she reached the giant oak tree she had walked 16 kilometers.

Knowing this you can find the total kilometers of the hike (which is the 100% of the hike) with the following expression:

`(16)/(80)=(total)/(100)\\\\total=(100)((16)/(80))\\\\total=20\ km`

Let be "x" the amount of kilometers Allison has left in the hike. This can be found with the following subtraction:

`x=20\ km-16\ km\\\\x=4\ km`