Pre-algebra PLease help

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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 is 1/3 is equvulant to 33 1/3% what percent is equvalnet to 2/3?
A 33 2/3%
B.150%
C 66 2/3%
D 65%
4. 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

5 Estimate 48% of 23.95
A. About $12.00
B. About $11.00
C. About $15.00
D. About $10.00

6. 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

7Which 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
8 What percent of 50 is 12.5?
A. 4%
B. 25%
C. 40%
D. 15%

9. 50 is 6.25% of what number?
A. 8
B. 80
C. 750
D. 800




My answers:
1.C
2. B
3. A
4. A
5. B
6. B
7. B
8.A
9. D

  • Pre-algebra PLease help -

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  • Pre-algebra PLease help -

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  • Pre-algebra PLease help -

    I get:

    1C
    2B
    3C (2/3 is just 2 * 1/3)
    4A

    5A 12 is 50% of 24
    That is a good first estimate. However, you are correct that 11 is closer (.48*23.95 = 11.49). I would have guessed 12, but 48% is a bit less than 50%, and 23.95 is a bit less than 24, so my estimate was a bit high. Getting 11 as the answer requires more calculation than estimation, IMO.

    6B

    7A Your proportion gives the correct answer, but it is just an accident. You are comparing the wrong quantities.

    8B 1.25 is 1/4 of 50: 25%

    9D

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