Percent Change and Error

Rob's text book says the density of an object is .83. He does an experiment and his result is .86. What is his percent error?

• .03%

• 3%

• .83%

• 3.6%

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

• 9%

• .09%

• 6%

• 8%

Meg estimated the weight of a rock to be 21 grams. When she weighed the rock, it was actually 23 grams. What was her percent error?

• 2%

• 8.7%

• 9.5%

• 10%

Tim guessed he had 650 football cards. When he counted, he actually had 548. What was his percent error?

• 102%

• 15.7%

• 18.6%

• 16.7%

Rick predicted he would score a 78 on his math quiz. He actually achieved an 84. What is his percent error?

• 6%

• 7.7%

• 6.7%

• 7.1%

Calculate the percent change from 83 degrees to 75 degrees.

• 8% decrease

• 8% increase

• 9.6% increase

• 9.6% decrease

Calculate the percent change from 73 feet to 79 feet.

• 6% increase

• 6% decrease

• 8.2% increase

• 8.2% decrease

Calculate the percent change from 73.4 miles to 65.2 miles.

• 8.2% increase

• 8.2% decrease

• 11.2% increase

• 11.2% decrease

Calculate the percent change from 34 minutes to 48 minutes.

• 14% increase

• 14% decrease

• 41.2% increase

• 41.2% decrease

Calculate the percent change from $323 to $542.

• 67.8% decrease

• 67.8% increase

• 219% decrease

• 219% increase