Percent Increase and Error Flashcard

Front

What is the formula to calculate the percentage of correct answers?

Back

Percentage of Correct Answers = (Number of Correct Answers / Total Number of Questions) × 100

Front

If Robert got 36 correct answers out of 50 questions, what is the percentage of correct answers?

Back

72% (Correct Answer: 36/50 × 100 = 72%)

Front

What is percent error?

Back

Percent Error = (|Measured Value - Actual Value| / Actual Value) × 100

Front

If Alex measured an item as 3.7 cm and the actual length is 3.5 cm, what is his percent error?

Back

5.7% (Correct Answer: |3.7 - 3.5| / 3.5 × 100 = 5.7%)

Front

What is the formula to calculate percent increase?

Back

Percent Increase = ((New Value - Old Value) / Old Value) × 100

Front

If Bill's salary increased from $48,000 to $49,920, what is the percent increase?

Back

3% (Correct Answer: (($49,920 - $48,000) / $48,000) × 100 = 3%)

Front

What is the difference between percent increase and percent error?

Back

Percent Increase measures the growth of a value, while Percent Error measures the accuracy of a measurement compared to the actual value.

Front

If Hannah estimated a bottle's volume as 2.2 liters and the actual volume is 2 liters, what is her percent error?

Back

10% (Correct Answer: |2.2 - 2| / 2 × 100 = 10%)

Front

How do you find the approximate percent of error in a measurement?

Back

Approximate Percent of Error = (|Estimated Value - Actual Value| / Actual Value) × 100

Front

If Denise measured her yard as 90 feet and the actual length is 86 feet, what is her percent error?

Back

4.7% (Correct Answer: |90 - 86| / 86 × 100 = 4.7%)