Calculate a tip at a restaurant

1. Calculate a tip at a restaurant Small groups Take a couple minutes to discuss what you know about tipping at a restaurant Share your findings

2. Objective(s) • Learn the easy way to calculate gratuity (a tip) at a restaurant (decimals) • Review adding decimals and finding the sum • Splitting the bill (mean or average) • Review check writing • Review rounding

3. First Evaluate your Service • Evaluate your service. The key is to objectively judge the service, and the service alone. The service itself should be judged on: • How the food matched with your order, • Whether the food was hot and fresh from the kitchen, • How attentive the server was to your needs, • How quickly your empty dishes were taken away, • How quickly it took to get your check and have your payment processed, and • Whether the server's demeanor was courteous and professional.

4. Determine the tip • The general guideline is 20% for excellent service, 15% for solid service, and 10% for bad service. On average, people tip 18%. • For our lessons today we will be working with 10%, 15%, and 20% tips. • Future decimal and percent lessons will explore the easy way to calculate an 18% tip! (hint double the tax). Tax in our state is between 8 and 9%. • Now that you know what percentage you want to pay, it's time to actually crunch the numbers.

5. To calculate a 10% tip (the easy way) • Remember we would leave a 10% tip if we felt the service was bad. • An easy way to figure a 10% tip is to move the decimal point one space to the left. For example, if the bill is $35.00 10% would be $3.50 What would 10% of 46.83 be? 10% would be $4.683 $4.683 can then be rounded to the nearest tenth (4.70) or the nearest dollar ($5.00)

6. To Calculate a 20% tip (the easy way) • An easy way to figure a 20% tip is to move the decimal point of the cost to find 10%, and then double it. For example, if the bill is $35.00 10% would be $3.50 if we double it ($3.50+$3.50) or ($3.50 x2) a 20% tip would be $7.00. Note: If it is difficult for you to add change in your head you can round to the nearest dollar. For good service round up, bad service round down. A 20% tip indicates they provided good service so we will round up. For example, if the bill is $35.00 10% would be 3.50, we can round that to $4.00 and then double it ($4.00 + $4.00), or ($4 x 2) = $8.00 20% tip would be $8.00

7. Try calculating a 20% tip What would 20% of 46.83 be? 10% would be $4.683 (rounded to the nearest tenth $4.70) Double it ($4.70+ $4.70) or ($4.70 x 2) =$9.40 Note: If it is difficult for you to add change in your head you can round to the nearest dollar. For good service round up, poor service round down. A 20% tip indicates they provided good service so we will round up. 20% of 46.83 (rounded to the nearest dollar). 4.68 rounds to $5.00 Double it ($5.00+$5.00), or ($5.00 x 2) = 10.00

8. To Calculate a 15% tip (the easy way) • An easy way to figure a 15% tip is to move the decimal point of the cost to find 10%, and add half of that amount. For example, if the bill is $35.00 10% would be $3.50 if we cut that in half we get $1.75 ($3.50+$1.75) = 5.25 a 15% tip would be $5.25. Note: If it is difficult for you to add change in your head you can round to the nearest dollar. For good service round up, bad service round down. A 15% tip indicates they provided good service so we will round up.

9. Note: If it is difficult for you to add change in your head you can round to the nearest dollar. For good service round up, poor service round down. A 20% tip indicates they provided good service so we will round up. What would 15% of 46.83 be (round to the nearest dollar)? 10% would be $4.683 (rounded to the nearest dollar $5.00) Add 10% ($5.00) + half of 10% (2.50) ($5.00+ $2.50) =7.50 $29.26 10% of $29.26 =2.926 2.926 rounds to $3.00, half of $3.00 is $1.50 ($3.00+$1.50) = $4.50

10. In your group discuss and answer the following questions • What is : • 10% of a bill that totals $61.32 • 15% of a bill that totals $25.55 • 20% of a bill that totals $ 36.81 (round each bill total to the nearest dollar)

11. In your groups discuss and answer the following questions • You and your group are eating out at The Firehouse Café today! • Each person chooses what they will eat and drink. • Go around the table and share your order with your group • As each person shares their order you write it down (the item and the cost) • What is the total bill for your group? (today we will not add tax) • Calculate a 10% tip, a 15% tip, and a 20% tip (round to the nearest dollar). • If you were to split the bill equally with the members of your group what would your portion of the bill be?

12. Homework • Create a story problem and calculate the total bill (without tax) and a 10%, 15%, and 20% tip. Round to the nearest dollar. • Write a check to pay for your meal, include the cost of the meal and the tip. Round to the nearest dollar (will you leave a 10%, 15%, or 20 % tip?) • Explain why you left a 10%, 15%, or 20% tip • Due tomorrow. • Example: • Sally went to Red Robin for lunch. She had a Pepsi $2.95, potato Skins $7.95, and a side Salad $4.95. 3.00+8.00+5.00=16.00 10% tip 1.60 rounded to the nearest dollar 2.00 15% tip (2.00+1.00) $3.00 20% tip ($2.00+$2.00), or ($2.00 x 2) =$4.00 I left a 20% tip because my hostess was very kind and provides great customer service. For example she was attentive to our needs. She refilled my Pepsi before I had to ask!

13. Sources • http://www.wikihow.com/Tip-Your-Server-at-a-Restaurant • http://www.ehow.com/how_5364600_quickly-calculate-tip.html • http://lenpenzo.com/blog/id1618-are-you -smarter-than-a-5th-grader-then-calculate-this-bill...