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Multiple Choice
What percentage of alcohol by volume does a bottle of 80-proof vodka contain?
A
20%
B
40%
C
80%
D
60%
Verified step by step guidance
1
Understand that the term "proof" is a measure of the alcohol content in a beverage, commonly used in the United States.
Recall the relationship between proof and alcohol by volume (ABV): the proof is exactly twice the ABV percentage.
Express this relationship mathematically as: \(\text{Proof} = 2 \times \text{ABV}\), where ABV is the percentage of alcohol by volume.
Rearrange the formula to solve for ABV: \(\text{ABV} = \frac{\text{Proof}}{2}\).
Substitute the given proof value (80) into the formula to find the ABV: \(\text{ABV} = \frac{80}{2}\), which gives the percentage of alcohol by volume.