Math
posted by Cami
So I have some math questions I'd like for some one to check :)
1. Rename 4/7 as a percent. Round to the nearest tenth of a percent if necessary.
A. 47%
B. 1.8%
C. 57.1%
D. 28%
2. Rename .709 as a percent.
A. 709%
B. 70.9%
C. 79%
D. 7.09%
3. Alice plays basketball. In one she shoot 21 free throws and makes 81.25% of them. Estimate how many free throws she makes?
A. About 16
B. about 2
C. About 20
D. About 14
4.Estimate 48% of 23.95
A. About $12.00
B. About $11.00
C. About $15.00
D. About $10.00
5. The bill at a restaurant is $58.50 and mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave?
A. About $15.00
B. About $9.00
C. About $6.00
D. About $11.00
6. What percent of 50 is 12.5?
A. 4%
B. 25%
C. 40%
D. 15%
7. 50 is 6.25% of what number?
A. 8
B. 80
C. 750
D. 800
8. Which proportion can be used to solve the following percent problem? What is 50% of 70%?
A. x/70 = 50/100
B. x/50 = 70/100
C. 50/70 = x/100
D. 70/x = 50/100
My answers:
4/7 as a percent. Round to the nearest tenth of a percent
= 0.57142 = 57.142% = 57.1% C
.709 as a percent
70.9% B
81.25% of 21 = about 16 A
48% of 23.95 = about 12.00 A
15% of $58.50 = about 5.8 + 2.9 = 8.7 = about 9 B
50 is 12.5?
12.5/50 = 25/100 = 25% B
50 is 6.25% of what number
50 = 0.625 times X
So x = 50/0.625 = 80 B
50% of 70% = 35
So the proportion would x/70 = 50/100 A

Ms. Sue
This answer is wrong:
7.
50 is 12.5?
12.5/50 = 25/100 = 25% B
The rest are correct. 
Cami
Oh, thank you Mrs.Sue :)!!

Ms. Sue
You're welcome, Cami.

Bosnian
Question 8
x / 70 = 50 / 100 Multiply both sides by 100
100 x / 70 = 50 Multply both sides by 70
100 x = 50 * 70
100 x = 3500 Divide both sides by 100
x = 3500 / 100 = 35
x / 50 = 70 / 100 Multiply both sides by 100
100 x / 50 = 70 Multply both sides by 50
100 x = 70 * 50
100 x = 3500 Divide both sides by 100
x = 3500 / 100 = 35
Answers A and B are the same. 
I LOST, 43 MILLION DOLLARS AND I DID IT DELIBERATELY
SOME question doesn't mean two questions
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