Percent Error Practice

Front

What is the formula to calculate percentage?

Back

Percentage = (Part / Whole) x 100

Front

If a student scores 15 out of 20 on a test, what is their score as a percentage?

Back

75% (15/20 x 100 = 75%)

Front

What is percent error?

Back

Percent error is a measure of how inaccurate a measurement is, expressed as a percentage of the actual value.

Front

How do you calculate percent error?

Back

Percent Error = |(Estimated Value - Actual Value) / Actual Value| x 100

Front

If a product costs $50 and is on sale for $40, what is the percent discount?

Back

20% discount ([(50-40)/50] x 100 = 20%)

Front

What is the total cost of an item priced at $30 with a 10% sales tax?

Back

$33 (30 + (30 x 0.10) = 33)

Front

If a student estimates they can finish a project in 5 hours but takes 6 hours, what is the percent error?

Back

20% error (|(5-6)/5| x 100 = 20%)

Front

What is the total cost of a meal that costs $40 with a 15% tip?

Back

$46 (40 + (40 x 0.15) = 46)

Front

If a student scores 18 out of 25 on a quiz, what is their grade as a percentage?

Back

72% (18/25 x 100 = 72%)

Front

What is the total cost of a $50 item with a 5% tax?

Back

$52.50 (50 + (50 x 0.05) = 52.50)