Final answer:
The full capacity of the bottle is found by dividing the known amount of water (20 ml) by the percentage it represents (15%), resulting in approximately 133.33 milliliters.
Step-by-step explanation:
The student is asking about determining the total capacity of a bottle when given that 20 milliliters of water is 15% of the bottle's capacity. To find the bottle's full capacity, we take the amount of water currently in the bottle, which is 20 milliliters, and recognize that this amount represents 15% of the bottle's full capacity. By setting up a proportion, we get 20 ml / 15% = Full capacity / 100%. Solving for the full capacity, we multiply both sides by 100% and divide by 15% to isolate the full capacity on one side of the equation. Therefore, the full capacity of the bottle is (20 ml * 100%) / 15%, which equals approximately 133.33 milliliters. Thus, the bottle can hold about 133 milliliters when full.