If you tipped 20% on a $15 bill, the tip would be $3.00. To calculate a 20% tip on a bill, you would multiply the total amount by 0.2. In this case, $15 multiplied by 0.2 equals $3.00.
If you tipped 20% on a $15 bill, the tip would be $3.00. To calculate, you would multiply the total bill by the percentage of the tip (in decimal form), so:
$15 bill x 0.20 (20% in decimal form) = $3.00 tip.