Jason waits on a customer whose check comes to $15.00. Jason's state applies a 20% tax to restaurant sales. If the customer gives Jason a $20 bill and tells him to keep the change, how much is Jason's tip?
First calculate how much the tax is by multiplying $15.00 by 20%: $15.00 * .2 = $
<gadget id="calculator">15*.2</gadget>
<output>3</output>
3.00.
Then subtract the cost of the meal and the tax from $20 to find Jason's tip: $20 - $15.00 - $3.00 = $
<gadget id="calculator">20-15-3</gadget>
<output>2</output>
2.00.

<result>2</result>