1. What is 57% of 11? (1 point)

11 = 0.57 • n; 19.3
n = 57 • 11; 627
n = 0.57 • 11; 6.

27
11 = 57 • n; 0.19
2. 224 is 25% of what number? (1 point)
224 • 0.25 = w; 560
224 = 0.25 • w; 896
224 • 0.25 = w; 56
224 = 0.25 • w; 90
3. Explain how to find 45% of a number. (1 point)
Multiply the number by 0.45.
Divide the number by 4.5.
Divide the number by 45.
Multiply the number by 4.5.
Find the percent of increase. Round to the nearest tenth of a percent where necessary.
4. 32 to 76 (1 point)
137.5%
42.1%
57.9%
2.4%
Find the percent of decrease. Round your answer to the nearest tenth of a percent where necessary.

5. 57 to 19 (1 point)
38%
66.7%
200%
20%
Find the percent of markup. Round to the nearest whole percent.

6. Store's Cost: $136.50
Selling Price: $184.70 (1 point)
48%
26%
14%
35%
Find the sale price. Round to the nearest cent.
7. Regular Price: $57.63
Percent of Discount: 10% (1 point)
$63.39
$5.76
$51.87
$57.53
Find the regular price. Round to the nearest cent.

8. Sale Price: $56.78
Percent Discount : 40% (1 point)
$141.95
$96.78
$79.49
$94.63
9. Find the interest earned in an account with $600 invested at 4.5% annual simple interest for 2 years. (1 point)
$540.00
$5,400.00
$54.00
$13.50
10. When invested at an annual interest rate of 4.7%, an account earned $1,290.33 of simple interest in 3 years. How much money was originally invested? If necessary, round to the nearest cent. (1 point)
$82,361.49
$9,151.28
$20.22
$91,512.77

MY ANSWERS:
1B
2A
3C
4D
5A
6A
7D
8C
9A
10C

My new answers



1. n = 0.57 • 11; 6.27
2. 224 = 0.25 • w; 896
3. Multiply the number by 0.45.
4. 137.5%
5. 66.7%
6. 35%
7. $51.87
8. $94.63
9. $54.00
10. $9,151.28

much better. All correct.

Here are the correct answers:

1. What is 57% of 11? (1 point)
11 = 0.57 • n
n = 0.57 • 11
n = 6.27

2. 224 is 25% of what number? (1 point)
224 = 0.25 • w
w = 224 / 0.25
w = 896

3. Explain how to find 45% of a number. (1 point)
Multiply the number by 0.45.

4. Find the percent of increase. Round to the nearest tenth of a percent where necessary.
Percent increase = (New value - Old value) / Old value * 100
Percent increase = (76 - 32) / 32 * 100
Percent increase = 137.5%

5. Find the percent of decrease. Round your answer to the nearest tenth of a percent where necessary.
Percent decrease = (New value - Old value) / Old value * 100
Percent decrease = (19 - 57) / 57 * 100
Percent decrease = -66.7% (negative because it is a decrease)

6. Find the percent of markup. Round to the nearest whole percent.
Markup percent = (Selling price - Cost) / Cost * 100
Markup percent = (184.70 - 136.50) / 136.50 * 100
Markup percent = 35%

7. Find the regular price. Round to the nearest cent.
Regular price = Sale price / (1 - Percent of discount)
Regular price = 57.63 / (1 - 0.10)
Regular price = 57.63 / 0.90
Regular price = $64.03

8. Find the original investment amount.
Original investment = Simple interest / (Annual interest rate * Time)
Original investment = 1290.33 / (0.047 * 3)
Original investment = $9,151.28

9. Find the interest earned in an account with $600 invested at 4.5% annual simple interest for 2 years.
Interest earned = Principal * Annual interest rate * Time
Interest earned = 600 * 0.045 * 2
Interest earned = $54.00

10. When invested at an annual interest rate of 4.7%, an account earned $1,290.33 of simple interest in 3 years. How much money was originally invested? If necessary, round to the nearest cent.
Original investment = Simple interest / (Annual interest rate * Time)
Original investment = 1290.33 / (0.047 * 3)
Original investment = $9,151.28

Your answers are mostly correct! Let's go through each question and explanation to make sure:

1. What is 57% of 11? (1 point)
To find 57% of 11, you multiply 11 by 0.57. The correct answer is 6. So, the correct answer is 1B.

2. 224 is 25% of what number? (1 point)
To find the number that 224 is 25% of, you divide 224 by 0.25. The correct answer is 896. So, the correct answer is 2B.

3. Explain how to find 45% of a number. (1 point)
To find 45% of a number, you multiply the number by 0.45. So, the correct answer is 3A.

4. 32 to 76 (1 point)
To find the percent increase from 32 to 76, you calculate [(new value - original value) / original value] * 100%. So, the correct answer is 4A.

5. 57 to 19 (1 point)
To find the percent decrease from 57 to 19, you calculate [(original value - new value) / original value] * 100%. So, the correct answer is 5A.

6. Store's Cost: $136.50 Selling Price: $184.70 (1 point)
To find the percent markup, you calculate [(selling price - cost) / cost] * 100%. So, the correct answer is 6A.

7. Regular Price: $57.63 Percent of Discount: 10% (1 point)
To find the regular price after a discount, you calculate [Regular price - (Percent of discount * Regular price)]. So, the correct answer is 7C.

8. Sale Price: $56.78 Percent Discount: 40% (1 point)
To find the regular price before a discount, you calculate [Sale price / (1 - Percent discount)]. So, the correct answer is 8C.

9. Find the interest earned in an account with $600 invested at 4.5% annual simple interest for 2 years. (1 point)
To find the interest earned in simple interest, you calculate [Principal * Rate * Time]. So, the correct answer is 9C.

10. When invested at an annual interest rate of 4.7%, an account earned $1,290.33 of simple interest in 3 years. How much money was originally invested? If necessary, round to the nearest cent. (1 point)
To find the original amount invested in simple interest, you calculate [Simple interest / (Rate * Time)]. So, the correct answer is 10C.

Great job! Your answers are correct for questions 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.