Exploring Percent Change and Percent Error

This video tutorial covers the concepts of percent change and percent error. It begins with an introduction to these concepts, followed by a detailed explanation of how to convert fractions to percents. The tutorial then demonstrates how to calculate percent change using a practical example involving earnings. Finally, it explains percent error and provides a step-by-step guide to calculating it using a temperature prediction scenario.

What is the first step in converting a fraction to a percent?

• Divide the numerator by the denominator

• Subtract the denominator from the numerator

• Multiply the fraction by 100

• Add the numerator and the denominator

If you have a fraction 3/8, what is the decimal equivalent?

• 0.25

• 0.625

• 0.375

• 0.5

How do you convert a decimal to a percent?

• Move the decimal point one place to the right

• Move the decimal point two places to the left

• Move the decimal point two places to the right

• Move the decimal point one place to the left

What is the percent equivalent of the fraction 12/25?

• 24%

• 36%

• 48%

• 60%

In the example where Ashley's earnings increased from $20 to $32, what is the percent change?

• 70%

• 60%

• 50%

• 40%

What is the formula for calculating percent change?

• Starting amount over difference

• Difference over actual value

• Difference over starting amount

• Actual value over difference

What does a percent error describe?

• How far away a result is from the expected value

• The difference between two values

• The exact value of an error

• The ratio of two values

In the percent error example, what was the predicted temperature?

• 60 degrees Fahrenheit

• 55 degrees Fahrenheit

• 50 degrees Fahrenheit

• 47 degrees Fahrenheit

How do you calculate the percent error?

• Difference over average value

• Difference over starting amount

• Difference over actual value

• Difference over predicted value

What was the percent error in the temperature prediction example?

• 15%

• 18%

• 16%

• 17%