Percent Quiz

Calculate the percent proportion: If 8 is 20% of a number, what is the number?

• 30

• 50

• 10

• 40

Solve the percent error problem: A student measured the length of a table as 120 cm, but the actual length is 130 cm. What is the percent error in the measurement?

• 10%

• 15%

• 5%

• 7.69%

Solve the percent error problem: A scientist estimated the weight of an object to be 500 grams, but the actual weight is 480 grams. What is the percent error in the estimation?

• 4.17%

• 10%

• 2.5%

• 1%

Solve the percent error problem: A company projected sales of 1000 units, but they only sold 900 units. What is the percent error in the sales projection?

• 20%

• 15%

• 5%

• 10%

Find the percent change: If a population increased from 500 to 600, what is the percent change?

• 50%

• 20%

• 25%

• 10%

Find the percent change: If the price of a product decreased from $80 to $64, what is the percent change?

• 25%

• -20%

• 10%

• 5%

Calculate the markup: A store bought a shirt for $20 and sold it for $30. What is the markup percentage?

• 60%

• 40%

• 50%

• 25%

Calculate the markdown: A store bought a toy for $50 and sold it for $40. What is the markdown percentage?

• 10%

• 30%

• 50%

• 20%

Calculate the simple interest: If the principal amount is $1000, the rate of interest is 5% per annum and the time is 2 years, what is the simple interest?

• $50

• $100

• $150

• $200

Calculate the final amount: If the principal amount is $2000, the rate of interest is 3% per annum, the time is 3 years and the interest is simple, what is the final amount?

• $2180

• $2200

• $2250

• $2300