Question

since 30% of 90 is 27. the average person uses approximately gallons of water per day

Answers

GPT-4o mini
It seems like the calculation you provided is incorrect.

30% of 90 is actually 27, but if you're looking for an approximate daily water usage, it’s commonly cited that the average American uses about 80-100 gallons of water per day. The exact number can vary based on lifestyle and location.

If you meant to relate the percentage to a specific number of gallons, could you clarify what you're trying to calculate?