12/12/24 Review Mastering Percent Flashcard

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. It is calculated using the formula: Percent Error = |(Measured Value - Actual Value)| / Actual Value * 100.

Front

How do you calculate percent error?

Back

To calculate percent error, subtract the actual value from the measured value, take the absolute value of the result, divide by the actual value, and then multiply by 100.

Front

If a student estimates a weight of 3 pounds, but the actual weight is 3.6 pounds, what is the percent error?

Back

Percent Error = |(3 - 3.6)| / 3.6 * 100 = 16.67%.

Front

What is the formula to find the sale price after a discount?

Back

Sale Price = Original Price - (Discount Rate * Original Price).

Front

If a shirt costs $20 and is on sale for 30% off, what is the sale price?

Back

Sale Price = $20 - (0.30 * $20) = $14.

Front

What does it mean to find a percentage of a number?

Back

Finding a percentage of a number means calculating a portion of that number based on the percentage given.

Front

How do you find 25% of a number?

Back

To find 25% of a number, multiply the number by 0.25.

Front

If a student scored 80% on a test with 50 questions, how many questions did they answer correctly?

Back

Correct Answers = 80% of 50 = 0.80 * 50 = 40 questions.

Front

What is simple interest?

Back

Simple interest is a method of calculating the interest charge on a loan or investment based on the original principal amount and the interest rate.

Front

How do you calculate simple interest?

Back

Simple Interest = Principal Amount * Interest Rate * Time.