Mastering Percents Quiz

What is 50% of 200?

• 50

• 100

• 150

• 200

Answer explanation

50% of 200 is calculated by multiplying 200 by 0.50, which equals 100. Therefore, the correct answer is 100.

If you save 25% of your $400 allowance, how much money do you save?

• $100

• $200

• $300

• $400

Answer explanation

You save 25% of $400, which is $100. Therefore, the correct answer is $100.

What percent of 50 is 25?

• 25%

• 50%

• 75%

• 100%

Answer explanation

To find the percentage, divide 25 by 50 and multiply by 100. So, (25/50) * 100 = 50%. Therefore, the correct answer is 50%.

A store is having a 20% off sale. If an item originally costs $250, how much does it cost after the discount?

• $50

• $200

• $230

• $250

Answer explanation

To find the cost after the discount, subtract 20% of $250 from $250. 20% of $250 is $50, so the cost after the discount is $250 - $50 = $200.

If 40% of a number is 80, what is 100% of the number?

• 100

• 200

• 300

• 400

Answer explanation

If 40% of the number is 80, then 100% of the number is 200. Therefore, the correct answer is 200.

What is 10% of 1,000?

• 10

• 100

• 1,000

• 10,000

Answer explanation

10% of 1,000 is 100, so the correct answer is 100.

A survey found that 75% of the students in a class like chocolate. If there are 20 students in the class, how many students like chocolate?

• 5

• 10

• 15

• 20

Answer explanation

The number of students who like chocolate is 75% of 20, which is 15. Therefore, 15 students like chocolate.

If a shirt costs $40 and is on sale for 30% off, how much is the discount?

• $10

• $12

• $20

• $28

Answer explanation

The discount is 30% of $40, which is $12. Therefore, the correct answer is $12.

A rectangle's length is increased by 20% and its width is decreased by 20%. What is the percent change in the area of the rectangle?

• 0%

• 4% decrease

• 4% increase

• 20% increase

Answer explanation

When the length is increased by 20% and the width is decreased by 20%, the overall change in area is a 4% decrease. This is because the increase in length is offset by the decrease in width, resulting in a net decrease in area.

If 6% of a number is 12, what is 50% of the same number?

• 50

• 100

• 150

• 200

Answer explanation

If 6% of the number is 12, then the number is 200. Therefore, 50% of the same number is 100.