# 7.1b Mastery Quiz

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Quizzes Created: 1 | Total Attempts: 582
Questions: 4 | Attempts: 582

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Students who can answer all 4 questions with a 100% mastery are ready to move on from this TEK.

• 1.

### The Crystal Clear Window Washing Company washed  of a high rise building 's windows on Monday,  on Tuesday, and  on Wednesday.  What percentage of the building's windows were not washed after three days?

• A.

17.5%

• B.

33%

• C.

67%

• D.

82.5%

A. 17.5%
Explanation
After three days, the Crystal Clear Window Washing Company washed 100% of the building's windows. Therefore, the percentage of windows that were not washed is 0%. However, none of the given answer choices match this explanation. Therefore, the correct answer is not clear or available.

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• 2.

### Mike received a 45% discount when he bought a new jacket.  Which of the following is NOT equivalent to 45%?

• A.

9/20

• B.

4/5

• C.

0.45

• D.

45/100

B. 4/5
Explanation
The answer 4/5 is not equivalent to 45% because when we convert 45% to a fraction, we get 45/100. However, 4/5 is equivalent to 80%, not 45%.

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• 3.

### The glee club is trying to raise money for their trip to the national competition. So far, they have been able to raise \$1,500 of the \$5,000 that they need. Which of the following is NOT equivalent to ?

• A.
• B.
• C.

30%

• D.

0.3

B.
Explanation
The correct answer is 0.3. This is because 0.3 is equivalent to 30%, as they both represent the same proportion or fraction of a whole.

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• 4.

### Khalid read a numerical value as “one hundred twenty-five thousandths.” Which of the following shows an equivalent way to write this value?

• A.

125,000

• B.

125%

• C.
• D.

12.5%

D. 12.5%
Explanation
The correct answer is 12.5%. This is because "one hundred twenty-five thousandths" can be written as a decimal by dividing 125 by 1000, which gives 0.125. Multiplying this decimal by 100 gives 12.5%.

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