Answer:

Explanation:
Let be "x" the amount of milliliters of sunscreen Yoku needs to conver
of his skin.
In order to get the solution of this exercise it is important to analize the information given in the exercise.
You know that Yoku uses
to cover an area of
of his skin, so, with this data you can set up the following proportion:

Then, the final step is to solve for "x" in order to find its value. This is:
