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Reverse percentages - PowerPoint presentation
lesson
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4.0 (1 Review)

Reverse percentages - PowerPoint presentation

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Grade Level Grades 9-12
Resource Type Presentation
License

About This Lesson

This presentation has been successfully used to clarify to students the rationale behind and the method of calculating reverse percentages. The key point is to let students understand that if we add; say; 20% to an amount; going back to the original amount is NOT done by subtracting 20%; but rather by dividing the new amount by the multiplier (1.20 in tis example). Examples for calculating original amount both after percentage increase and decrease.

Resources

Files

Reverse_percentage(1).ppt

Presentation
February 7, 2020
964.5 KB
4.0
1 Reviews
SML Member
July 04, 2016
SML Member
January 30, 2016
Good use of animation
I like the way you have animated the increase/decrease - it gives a clear visual pictures to help learners grasp the concepts. Thanks for sharing.
SML Member
February 19, 2009
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