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1 Review | 85 Downloads

Reverse percentages - PowerPoint presentation

Grade Level Grades 9-12
Resource Type Presentation


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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.


1 Review
Generated comment #102011
SML Member
July 04, 2016
Generated comment #7464
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