Answer:
$10.8 is left.
Step-by-step explanation:
Given that,
Total amount = $54
Left amount = 20%
We need to find how much tip should you leave. It means we need to find 20% of 54. So,
[tex]A=\dfrac{20}{100}\times 54\\\\=\$10.8[/tex]
So, $10.8 is left.