Math · 5 questions
Percentages in Everyday Math Quiz
Percent means “per hundred.” Use that idea to solve each question, then compare your thinking with the worked answer below it.
Before choosing, recall the answer without looking at the choices. Pick the best match and explain why the others do not work. Answers and sources are shown beneath each question; for a less guided attempt, cover that part until you commit to an answer.
Question 1 of 5
What does 25% mean as a fraction of a whole?
Answer: 25/100
Percent means per hundred, so 25% is 25 out of 100. It also simplifies to one quarter.
Read the source: OpenStax Prealgebra 2e: Understand PercentQuestion 2 of 5
A quiz has 20 questions. If you answer 15 correctly, what percentage is correct?
Answer: 75%
15 ÷ 20 = 0.75. Multiply by 100 to express it per hundred: 75%.
Read the source: OpenStax Prealgebra 2e: Understand PercentQuestion 3 of 5
What is 10% of 80?
Answer: 8
10% is 10/100, or one tenth. One tenth of 80 is 8.
Read the source: OpenStax Prealgebra 2e: Understand PercentQuestion 4 of 5
A notebook costs 200 units and is discounted by 25%. What is the price after the discount?
Answer: 150 units
25% of 200 is 50. Subtract that discount from 200 to get 150 units.
Read the source: OpenStax Prealgebra 2e: Understand PercentQuestion 5 of 5
Which decimal is equal to 5%?
Answer: 0.05
5% means 5/100. Dividing 5 by 100 gives 0.05.
Read the source: OpenStax Prealgebra 2e: Understand PercentWhat to do after this quiz
Look at missed questions and name the idea behind each one. Was it a definition, process, or calculation? Read the linked source, close it, and write a one-sentence explanation from memory. Explaining why tempting wrong choices are wrong goes beyond recognising an answer.
Return later and try again without reviewing choices. Repeated attempts on fixed questions can feel easier because they are familiar; test another example or your notes to see whether the idea has stuck.
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