Final answer:
The amount of the tip is $10.94 and the total amount you leave is $65.62.
Step-by-step explanation:
To calculate the amount of the tip, multiply the total bill by the tip percentage. In this case, the bill is $54.68 and the tip percentage is 20%. So, the tip amount would be $54.68 x 0.20 = $10.94.
To find the total amount you leave, add the tip amount to the bill. So, the total amount you leave would be $54.68 + $10.94 = $65.62.