Percent Test Review Wednesday, May 22, 2013

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Presentation transcript:

Percent Test Review Wednesday, May 22, 2013

Write the following percents as decimal numerals…

Write the following decimal as a percent… (with no decimals!)

82 %

In your own words… state the rules for converting to and from percents to decimals.

What types of percentage problems can you do in your head ? Without a calculator… What types of percentage problems can you do in your head ?

a) Find 25 % of 80 b) Find 13 % of 27 c) Find 36 % of 25 d) Find 19 % of 34 e) Find 100 % of 53

What should you do if you can’t calculate the number exactly ? a) Find 25 % of 80 b) Find 13 % of 27 c) Find 36 % of 25 d) Find 19 % of 34 e) Find 100 % of 53 What should you do if you can’t calculate the number exactly ?

Turn to a partner…

Solve... (use the proportion method)

Out of 450 seventh graders, 405 answered this question correctly Out of 450 seventh graders, 405 answered this question correctly. What percent of seventh graders answered this question correctly?

90 %

The regular price of a new pair of sunglasses is $245 The regular price of a new pair of sunglasses is $245. This week the sunglasses are on sale for 15% off. Find the amount of the discount and the sale price.

Discount Amount: $36.75 Sale Price: $208.25 Original Amount Discount Amount Sale Price

There is an 8% sales tax on the sunglasses, and the salesperson makes 12% commission. What is the final cost ? How much commission did the salesperson earn on this sale ?

Final cost: $224.91 Commission: $24.99

Wolek-Mart purchases calculators for $15 Wolek-Mart purchases calculators for $15.00 each and sells them at a markup rate of 175%. What is the selling price? How much profit is made on each sale ?

Selling price: $41.25 Profit: $26.25

You bought a ticket to see Lady Gaga for $150 You bought a ticket to see Lady Gaga for $150. You sold it on Craig’s List for $315. Find the percent of increase on the price of the ticket.

110 %

We started with 180 days to go… and now we are down to 20 We started with 180 days to go… and now we are down to 20 ! Find the percent of decrease in the number of days of school we have left.

Find each percent of change, amount of increase, or amount of decrease.

25 is increased by 80%

20

40 is decreased to 33

17.5%

$14.40 is decreased by 20%

$2.88

54 is decreased by 75%

40.5

Simple Interest I = p r t

Find the missing value. I = _____ , P = $1,000 , r = 3% , t = 6 months

I = $15

Find the missing value. I = $452.16 , P = $1,256 , r = 12% t = _____

t = 3 years

Find the missing value. I = $555.75 , P = $950 , r = ____ , t = 15 years

r = 3.9%

Craig deposits $1,000 in a savings account that earns 5% simple interest. How long will it take for the total amount in his account to reach $1,350?

7 years

If you borrow $12,000 for 30 months at 6 If you borrow $12,000 for 30 months at 6.5% simple interest, what is the total amount you will have to repay?

$13,950

What should I do to better prepare for tomorrow’s assessment?