APA Unit 3 Test Review (Percent Problems)

Front

What is percent change?

Back

Percent change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

How do you calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.

Front

Calculate the percent change from 34 minutes to 48 minutes.

Back

41.2% increase.

Front

What is the formula to find what number a percentage is of?

Back

If X is the number and P is the percentage, then X = (Part / Percentage) x 100.

Front

75 is 20% of what number?

Back

375.

Front

What is 24% of 480?

Back

115.2.

Front

What is percent error?

Back

Percent error is the difference between the estimated value and the actual value, 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

You estimate that you sent 135 texts last week, but when you get the bill it was actually 108. What was your percent error?

Back

25%.

Front

Lou predicts tomorrow's temperature will be 72 degrees. It only reaches 66 degrees. What was his percent error?

Back

9%.