10% Method
Tax, Tip, Discounts
Percent of Change / Error
Fraction toDecimal to %
Modeling Real Life
100

10% of 80

What is 8?

100

What is the tax on an item that costs $50 with 6% tax?

What is $3.00?

100

64 to 89.

What is the percent of change?  Is it an increase or a decrease?

What is a 39% increase?

100

Write 33% as a fraction

What is 33/100?

100

A costume is regularly priced at $25.  This weekend the store is having a Happy Halloween sale.  They are offering 20% off.  What will be the total cost of the costume?

What is $20

200

10% of 189

What is 18.9?

200

You want to leave your server a 15% tip.  The price of your meal was $24.  How much do you leave for tip?

What is $3.60?

200

10 to 20

What is the percent of change?  Is it an increase or a decrease?

What is a 100% increase?

200

Write 3/5 as a decimal

What is 0.6?

200

A pair of jeans is regularly priced at $40.  You used a coupon, and the price before tax was $32.  What was the % savings that your coupon offered?

What is 20% ?

300

20% of 6000

What is 1200?

300

A $40 shirt is on sale 20% off.  How much do you save on the shirt?

What is $8?

300

The average price goes from $50 to $40?  What is the percent of decrease?

What is 20%?

300
Write 0.555... as a fraction

What is 5/9?

300

In a class, 25% of the students have blue eyes. A total of 7 students in the class have blue eyes.  How many students are in the class?

What is 28?

400

30% of 500

What is 150?

400

What is the better deal.....

A)  Jeans that cost $45 and you have a 25% coupon

or

B)  Jeans that cost $58 and you have a 40% coupo

What is A?

400

You guessed that there were 240 jelly beans in a jar.  There was actually 300.  What is your percent error?

What is 20%?

400

What is 7/10 as a percent?

What is 70%

400

You bought groceries and lost your receipt.  You remembered the price of the tax, $5.55, and you know the tax rate was 6%.  How much were the groceries you bought before tax?

What is $108.11?

500

15% of 220

What is 33?

500

A pair of tennis shoes are regularly priced at $129.99, and they are marked 30% off the original price.  You also have a coupon for an additional 15% off.  What is the cost you will pay for the shoes?

What is $77.34?

500

You estimated that it would take 45 minutes to do your homework.  It actually took 20 minutes.  What was your percent error?

What is 125% error?

500

Write 1.5% as a decimal

What is 0.015?

500

You bought a new phone that was $700 with a 20% off coupon, had to pay 6.5% tax.  What was the total with tax?

What is $596.40?

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