Carla's order at Mcdonald's costs $7.50, but she has a coupon for $2.50. If she gets an additional 20% discount for being a senior citizen, how much does she pay for her order in dollars total?
First subtract the coupon amount from the price of the food: $7.50 - $2.50 = $
<gadget id="calculator">7.5-2.5</gadget>
<output>5</output>
5.00.
Then subtract 20% from 100% to find out what percentage of the reduced price Carla pays: 100% - 20% = 80%
Now multiply the price after the coupon by the percentage Carla pays to find the final price: $5.00 * .8 = $
<gadget id="calculator">5*.8</gadget>
<output>4</output>
4.00.

<result>4</result>