Answer:
$64.44
Explanation:
To find the amount for the tip, multiply $53.70 by 20%.
First, change 20% to a decimal by moving the decimal left two places, or dividing 20 by 100.
20% = 0.2 as a decimal
Now you can multiply to find the tip.
$53.70 x 0.2 = $10.74
Finally, add the tip to the amount of the bill.
$53.70 + $10.74 = $64.44