Construct an example of when confusing additive and proportional thinking could result in an incorrect answer.Describe an incorrect process that a learner might follow.Describe a correct way to find the solution and a way you might help the learner to see his error.

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The Answer is Ben and Mike were both dieting.Ben went from 200 to 180 pounds while Mike went from 240 to 219 pounds.Who was the more successful dieter? A student might incorrectly think Mike was more successful,because he lost 21 pounds and Ben only lost 20,because he is thinking additively.The teacher might need to use some of the strategies from

Construct an Example of When Confusing Additive and Proportional Thinking