To determine the amount of synthetic oil needed, we need to find the ratio of synthetic oil to the total amount of oil. If there are 4 liters of natural oil for every 7 liters of synthetic oil, then the total ratio of natural oil to synthetic oil is 4:7.
To find the total amount of oil needed, we add the two parts of the ratio: 4 + 7 = 11.
To determine the amount of synthetic oil needed, we divide the total amount of oil by the total ratio: 825 / 11 = 75.
Therefore, 75 liters of synthetic oil are needed to make 825 liters of Petrolyn oil.
Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 4 liters of natural oil for every 7 liters of synthetic oil. In order to make 825 liters of Petrolyn oil, how many liters of synthetic oil are needed?
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