Exploring Percent Change and Percent Error

What is the first step in calculating percent change?

• Subtract the numbers

• Divide the numbers

• Add the numbers

• Multiply the numbers

If a girl's height increases from 130 cm to 160 cm, what is the percent change?

• 30%

• 20%

• 23%

• 25%

To convert a decimal to a percent, you should:

• Multiply by 100

• Divide by 100

• Multiply by 10

• Subtract 100

What is the percent decrease if the temperature drops from 72 degrees to 64 degrees?

• 11%

• 10%

• 12%

• 8%

When calculating percent decrease, which number should be the denominator?

• The average of the two numbers

• The smaller number

• The larger number

• The number that occurs first in time

James predicted the Lakers would win by 6 points, but they won by 15 points. What is the percent error?

• 70%

• 60%

• 80%

• 50%

To find the percent error, you divide the absolute error by:

• The actual outcome

• The average value

• The sum of the values

• The predicted value

What is the formula for percent change?

• Difference divided by the final number

• Sum divided by the final number

• Difference divided by the original number

• Sum divided by the original number

How do you convert a decimal to a percent?

• Multiply by 100

• Divide by 100

• Multiply by 10

• Divide by 10

What is the final step in calculating percent error?

• Move the decimal two places to the left

• Move the decimal two places to the right

• Add the numbers

• Subtract the numbers