# Estimating a tip without a calculator Online Quiz

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Q 1 - Bill took his family out to dinner. He wanted to give the waiter a 15% tip. If the total amount of the dinner was $58, what should be paid to the waiter as a tip? ### Answer : C ### Explanation Step 1: Bill amount =$58

First to get 10% of $58.00, we move decimal one place to left and get$5.80

Step 2:

5% is half of 10%. So 5% of $58 =$\frac{\$5.80}{2} = \$2.90$Step 3: So, 15% of$58 = 10% of $58 + 5% of$58

= $5.80 +$ 2.90 = $8.70 Q 2 - Some ladies went out to a restaurant to celebrate a birthday. The total bill came to$240 of which $15.00 was tax. They decided to leave a 10% tip. How much of a tip should they leave for the waiter? ### Answer : A ### Explanation Step 1: Bill amount before tax =$240 − $15 =$225.00

Step 2:

To get 10% of $225.00, we shift decimal one place to left to get the tip as$22.50

Tip for waiter = 10% of $225.00 =$22.50

Q 3 - Maggie went to a beauty salon to get her hair cut and styled. Her bill came to $115.00. How much did Maggie tip her hairdresser, if she gave 20% tip? ### Answer : B ### Explanation Step 1: Bill amount =$115

Tip = 20% of $115.00 Step 2: First to get 10% of$115.00, we move the decimal one place to the left to get $11.50 Step 3: To get 20% we double this amount as 20 = 2 × 10 So 20% of$115 = 2 × $11.50 =$23.00

So tip amount = $23.0 Q 4 - You go out to eat with friends and your bill was$88. If you tip the waiter 15%, how much amount is paid as tip?

### Explanation

Step 1:

Bill amount = $88; For 10% of$88.00, we move decimal one place to left and get $8.80; Step 2: 5% of$88 = $\frac{\$8.80}{2} = \$4.40$

Step 3:

15% of $88 = 10% of$88 + 5% of $88 =$8.80 + $4.40 =$13.20

So tip amount = $13.20 Q 5 - Mr. & Mrs. Smith hired movers to shift their household items to their new home. They were billed$650 for the work. If they decided to give 10% tip to the movers, how much would the movers receive for a tip?

### Explanation

Step 1:

Bill amount = $650.00 To get 10% of$650.00, we shift the decimal one place to left and get $65.00 Step 2: So, tip amount received by the movers =$65

Q 6 - Thomas pays a parking bill of $48. He decides to leave a 5% tip for the parking guard. How much will the total bill be? ### Answer : B ### Explanation Step 1: Parking bill amount =$48.00

To get 10% of $48.00%, we shift decimal one place to left and get$4.80

Step 2:

5% is half of 10%.

So 5% of $48.00 =$\frac{\$4.80}{2} = \$2.40$Step 3: Total bill = bill amount + tip =$48.00 + $2.40 =$50.40

Q 7 - Mr. Maddox’s bill at a restaurant is $96.50. He decides to leave a 10% tip for the waiter. How much is the tip that he leaves for the waiter? ### Answer : D ### Explanation Step 1: Bill amount =$96.50

To get 10% of $96.50, we shift the decimal one place to left and get$9.65

Step 2:

So, tip amount = $9.65 Q 8 - Freddy traveled to meet with new clients. He took a cab and his cab fare came to$64.00. How much did Fred tip the cab driver, if he gave 15% as tip?

### Explanation

Step 1:

Bill amount = $64.00; For 10% of$64.00, we move decimal one place to left and get $6.40; Step 2: 5% of$64 = $6.40/2 =$3.20

15% of $64 = 10% of$64 + 5% of $64 =$6.40 + $3.20 =$9.60

Step 3:

So, tip amount = $9.60 Q 9 - James took his friend to a restaurant. He got a total bill for$145. The tax on the bill was for $15. If James left a 15% tip. How much of a tip did James leave? ### Answer : B ### Explanation Step 1: Bill amount before tax$145 − $15 =$130

For 10% of $130.00, we move decimal one place to left and get$13.00;

Step 2:

5% of $130.00 =$\frac{\$13.00}{2} = \$6.50$15% of$130 = 10% of $130 + 5% of$130

= $13.00 +$6.50 = $19.50 Step 3: So, tip amount =$19.50

Q 10 - Nora’s bill at a store is $120. If she leaves a 2% tip for the gate keeper, how much will the total bill be, including tip? ### Answer : A ### Explanation Step 1: Bill amount =$120

Tip amount = 2% of $120 Step 2: To get 1% of$120.00, we shift the decimal two places to the left and get $1.20 To get 2% of$120 we double this amount So, the tip amount = 2 × $1.20 =$2.40

Step 3:

Total bill = bill amount + tip amount

= $120 +$2.40 = \$122.40

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