7.1B Mastery Quiz

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

9/20

4/5

0.45

45/100

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%.

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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2. 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

30%

0.3

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.

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.

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

125,000

125%

12.5%

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%.

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%.

4. 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?

17.5%

33%

67%

82.5%

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.

Explanation

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Mar 22, 2022

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Mar 13, 2013

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7.1b Mastery Quiz