Going Shopping

Percents

100

Write 75% as a fraction

75/100

200

Write .27 as a percent

27%

300

Write 63/100 as a percent

63%

400

Write 2.03 as a percent

203%

500

Write 107% as a decimal

1.07

Percent Increases

100

Disney World had 100 rides last year.  They plan to increase the number of rides by 2% this year.  How many rides do they intend to have? 

102  (100*(1 + 2/100))

200

Ana works at Apple as a software engineer and gets paid $150,000 per year.  If she gets a 12% increase next year, what will her salary be?

$168,000   ($150,000*(1.12))

300

Your last Algebra exam had 30 problems on it.  Your Algebra teacher said the next exam will have 10% fewer problems. How many problems will be on the exam?

27  (30*(1-.10))

400

The basketball team won 15 games last year and 22 games this year.  What is the percent increase in games won?

47%  (22-15)/15*100%

500

If your salary is $80,000.  Which is better, a 13% raise or a $10,000 increase and by how much?

The 13% raise is better by $400  ($80,000*13/100 is $10,400 versus $10,000)

Sales Discounts

100

If there is a $15 discount on a pair of $50 shoes, how much do the shoes cost after the discount?

The shoes cost $35 ($50 - $15)

200

A pair of $90 boots at Macy's is 45% off. How much is the discount?

The discount is $40.50 (Yes!!! ... $90 * 45/100)

300

$300 flights to Hawaii are 50% off in February on Spirit.  What is the cost after the discount?

$150  ($300 * 50/100)

400

A 3-Day Vacation package of $750 to Disney World in Florida is on sale for 40% off in January.  What is the price of the package after the discount?

$450 ($750 - $750*40/100)

500

A $50,000 BMW is on sale for a week only.  BMW's are 10% off.  What is the cost of a BMW with the discount and a 10.25% sales tax?

$49,613  ($50,000*90/100*(1.1025))

Sales Taxes

100

What is the sales tax on a $15 Chick-fil-A Meal if the sales tax rate is 8%?

Sales tax is $1.20 ($15 * 8/100)

200

If you paid $4.15 in sales tax on a $50 sweatshirt in Indiana, what was the sale tax rate paid?

8.3% ($4.15/$50*100%)

300

Ariana Grande perfume is $42 at Macy's.  What is the total cost with a 10.25% sales tax?

$46.31 ($42 + $42*10.25/100) or ($42 + $4.31)

400

Correct the error and find the final cost:  Chicago Bears jerseys are 1/3 off a $75 original price. Sales tax is 10%.The final cost for a jersey is $75 * 1/3 * (1.10) which is $27.50.

The final cost is $55  ( $75*(1 - 1/3)*(1.1) )

500

$279 Beats headphones are on sale at Target for 35% off.  Sales tax is 9.3%.  What is the final cost you will pay?

$198.22   ($279*(1-.35)*(1.093))

Tips

100

What is a 20% tip on a $6 coffee at Starbucks?

$1.20 ($6 * 20/100)

200

If a tip of 15-20% is good, is a tip of $7 on a $70 meal a good tip?

No, it's a 10% tip ($7/$70*100%)

300

Taking an Uber to Downtown Chicago is $30.  What is a 17% tip?

The tip is $5.10 

($30 * 17/100)

400

What is the total cost on a $50 meal at Home Run Inn if you pay 20% tip and 10% sales tax?

The total paid is $65 ($50 +$50*20%+$50*10%)   (You don't have to pay tip on taxes)

500

Your haircut, with all the works, cost $90.  You paid the hairstylist $110.  What percent tip did you pay?

You gave a 22% tip ... nice! ($110-$90)/$90*100%