Final answer:
The student's question is about mathematics, specifically calculating portions of a whole, which is a concept taught at the middle school level. Yuki would use percentage, ratio, or proportion calculations to determine the volume of cleaning solution needed for an aquarium tank based on its total volume.
Step-by-step explanation:
The student's question involves Yuki, who works at an aquarium, and is related to the calculation of a specific portion of a tank's total volume to determine the amount of cleaning solution to use. The exact portion to be calculated is not provided in the question. However, we can explore the concept using the provided examples. In such scenarios, Yuki would use a mathematical calculation such as a percentage, ratio, or proportion to find out how much cleaning solution to add to the aquarium.
For example, if Yuki knows that she needs to add cleaning solution that is 5% of the tank's volume and the tank's volume is 100 liters, she would calculate 5% of 100 liters, which is 0.05 × 100 = 5 liters of cleaning solution. Similarly, if she has a different percentage to work with, the calculation would adjust accordingly.
The mathematical operations involved here typically include converting percentages to decimals, multiplying to find parts of a whole, and sometimes converting units (like liters to milliliters) if necessary. These are essential skills in mathematics and are often taught at the middle school level.