In a test for alcohol content using a 100mL container, if there is 15mL of water after the test, what is the percentage of alcohol in the fuel?

To determine the percentage of alcohol in the fuel based on the given information, we first look at the total volume of the container, which is 100 mL. After the test, there is 15 mL of water remaining. This means that the volume of alcohol that was present in the container can be calculated by subtracting the volume of water from the total volume.

If 15 mL of water is present, then the volume of alcohol would be:

100 mL (total volume) - 15 mL (volume of water) = 85 mL (volume of alcohol).

Next, to find the percentage of alcohol in the fuel, we take the volume of alcohol and divide it by the total volume, then multiply by 100 to convert it to a percentage:

(85 mL alcohol / 100 mL total volume) × 100 = 85%.

Given that 85 mL of the total 100 mL is alcohol, this would indicate that the percentage of alcohol should account for what portion remains as a liquid, not directly translating to the provided choices.

However, if we are to interpret the options listed purely in terms of the content left within the context of typical questions around water and alcohol content