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 calculate total bill including tax and tip?

Back

Total Bill = Original Amount + (Tax Rate x Original Amount) + (Tip Rate x Original Amount).

Front

If a dinner costs $78.89, tax is 8%, and tip is 20%, what is the total bill?

Back

$100.90.

Front

What is simple interest?

Back

Simple interest is calculated on the principal amount only, not on the interest accrued.

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal x Rate x Time.

Front

If Anna invested $2,500 at an annual rate of 5%, how long will it take to earn $1,125 in interest?

Back

9 years.

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.