The bill for a meal was $33.75. The customer left $40.00. What percentage of the bill was the tip?

To find the percentage of the bill that was the tip, we need to calculate the amount of the tip first.

The amount of the tip is the difference between the total amount left and the bill itself, or 40.00 - 33.75 = $<<40.00-33.75=6.25>>6.25.

To find the percentage, we divide the tip amount by the bill amount and multiply the result by 100: (6.25 / 33.75) * 100 = 0.185 * 100 = 18.5%.

Therefore, the tip was 18.5% of the bill.