AnswersCommon Core Math 7 - MA3107 CRPercent Increase and Decrease

Percent Increase and Decrease — Unit test Answers

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1
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Nikhil gets paid a 5 percent commission on every pair of shoes that he sells. He earned $1.00 on the last pair of shoes that he sold. The expression that can be used to represent x, the price of the shoes, is What was the price of the shoes?

Question illustration
A
$5.00
B
$10.00
C
$20.00
D
$25.00
2
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The diagram below represents which percent?

Question illustration
A
3.2%
B
8%
C
32%
D
42%
3

In an election, Mr. Jones received 70% of the 1,500 votes cast. How many votes did Mr. Jones receive?Votes Cast10%10%10%10%10%10%10%10%10%10%

A
900
B
1,050
C
1,125
D
1,200
4

The Bishop family celebrated a birthday by dining out at a local restaurant. Their bill was $97.45. Mr. Bishop would like to leave a 18 percent tip at the table for the server. What is the total amount that the family will pay for the dinner? Round to the nearest cent if necessary.

A
$17.54
B
$19.49
C
$114.99
D
$116.94
5

What is the approximate percent decrease when a fish count goes down from 850 to 500?

A
The percent decrease is approximately 40%.
B
The percent decrease is approximately 70%.
C
The percent decrease is approximately 140%.
D
The percent decrease is approximately 240%.
6

Use the diagram to solve. What is 260% of 6? PercentTotal100%100%20%20%20%260%

A
3.6
B
9.6
C
15.6
D
21.6
7

The following information is known about a savings account.Time = 6 yearsInterest rate = 1.9%Principal = $850What amount of total interest will be earned at the end of year 6?

A
$16.15
B
$96.90
C
$946.90
D
$9,690.00
8

Gene paid a deposit on a leased car. The deposit earns 2.8 percent simple annual interest. At the end of the year, the interest that is earned is $22.40. What was the amount of the original deposit?

A
$0.63
B
$80.00
C
$62.72
D
$800.00
9

Lena told her mother that the jeans that she bought were on sale for 10 percent off and she had saved $8.25 on them. PercentsTotal10%10%10%10%10%10%10%10%10%10%100%$8.25$8.25$8.25$8.25$8.25$8.25$8.25$8.25$8.25$8.25 Lena’s mother wanted to know the price of the jeans before the discount to determine if Lena was shopping for jeans that were too expensive. What was the price of the jeans before the discount?

A
$41.25
B
$74.25
C
$82.50
D
$90.75
10

Alexi’s restaurant bill is $58, and he wants to leave a 20 percent tip. Which expression represents the total amount that Alexi needs to pay?

A
58 dollars (0.20) + 58 dollars
Option A
B
58 dollars (0.20)
Option B
C
58 dollars (20) + 58 dollars
Option C
D
58 dollars (20)
Option D
11

A dining set is priced at $785. If the sales tax is 7 percent, what is the cost to purchase the dining set? Round to the nearest cent if necessary.

A
$54.95
B
$792.00
C
$839.95
D
$1134.50
12

A girl’s club held a fundraiser last year and raised $600 for the local soup kitchen. This year they raised $960. What is the percent change in the total amount raised by the girl’s club?

A
The percent change is 0.38%.
B
The percent change is 0.6%.
C
The percent change is 38%.
D
The percent change is 60%.
13

If Allison wants to find 80% of 630, which table should she use?

A
A 2-column table with 6 rows. Column 1 has entries 20 percent, 20 percent, 20 percent, 20 percent, 20 percent, total 100 percent. Column 2 has entries blank, blank, blank, blank, blank, blank.
Option A
B
A 2-column table with 5 rows. Column 1 has entries 25 percent, 25 percent, 25 percent, 25 percent, Total 100 percent. Column 2 has entries blank, blank, blank, blank, blank.
Option B
C
A 2-column table with 4 rows. Column 1 has entries 40 percent, 40 percent, 40 percent, Total 100 percent. Column 2 has entries blank, blank, blank, blank.
Option C
D
A 2-column table with 13 rows. Column 1 has entries 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, 8 percent, Total 100 percent. Column 2 has entries blank, blank, blank, blank, blank, blank, blank, blank, blank, blank, blank, blank, blank.
Option D
14

A pan has an original price of $32 but is marked down by 15 percent. Which equation shows the new price of the pan?

A
(32 dollars) (100 percent minus 15 percent) = (32 dollars) (85 percent) = 27 dollars and 20 cents
Option A
B
(32 dollars) (15 percent) = 4 dollars and 80 cents
Option B
C
(32 dollars) (15 percent) + 32 dollars = 4 dollars and 80 cents + 32 dollars = 36 dollars and 80 cents
Option C
D
(32 dollars) (185 percent) = 59 dollars and 20 cents
Option D
15

Rachel finished a meal at a diner and received a bill for $10.99. She charged the bill along with a 15 percent gratuity to her credit card. What is the total amount she charged to her credit card? Round to the nearest cent if necessary.

A
$11.14
B
$12.64
C
$13.19
D
$13.73
16

A student made the table to find 40% of 130. 20%20%20%20%20%= 100%0.20.20.20.20.2= 12626262626= 130Which expression can be used to find 40% of 130?

A
(26) (5)
Option A
B
(26) (4)
Option B
C
(26) (3)
Option C
D
(26) (2)
Option D
17

Samantha spent 40 minutes on homework. Sixty percent of that time was spent on language arts. How many minutes were spent on language arts?

Question illustration
A
20 minutes
B
24 minutes
C
28 minutes
D
32 minutes
18

Which percent change represents a percent increase?

A
Original amount 978New amount 118Percent change 87%
Option A
B
Original amount 574New amount 678Percent change 18%
Option B
C
Original amount 1,055New amount 1,000Percent change 5%
Option C
D
Original amount 1,254New amount 1,045Percent change 17%
Option D
19

What is the retail price of a shirt that has a wholesale price of $12 and is marked up by 60 percent?

A
$7.20
B
$19.20
C
$31.20
D
$72.00
20

The owner of a health club decides to reduce the $35 membership fee by $5. What is the approximate percent decrease in the fee?

A
The percent decrease is approximately 0.14%.
B
The percent decrease is approximately 0.85%.
C
The percent decrease is approximately 14%.
D
The percent decrease is approximately 85%.

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