Reverse Percentage Change

A short video highlighting the methods for reverse percentage change problems. For example if a sales tax of 6 percent was added to the bill to make it 212 work out 6 100 0 06. Maths videos by jayates 45 453 views.

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There were 160 smarties in the box yesterday but now there are 116 what is the percentage change.

Reverse percentage change. Passing n5 maths significantly increases your career opportunities by helping you gain a place on a college course apprenticeship or even landing continue reading. 160 to 116 is a decrease of 44. Reversing a change welcome to national5maths co uk a sound understanding of reversing a change is essential to ensure exam success. Either add subtract the percentage given in the.

Compared to yesterday s value. Reverse percentages help us to work out the original price or value of an item after it has been increased or decreased in value for example following a price increase or a. Using reverse percentages is a way of working backwards on a percentages problem in order to find the original amount. Step 1 get the percentage of the original number.

In order to do this we. Circle theorems gcse. How to find an original amount duration. Reverse percentages are used when the percentage and the final number is given and the original number needs to be found.

If the percentage is an increase then add it to 100 if it is a decrease then subtract it from 100. 44 160 0 275 27 5 decrease. Divide the percentage added to the original by 100. For example if a sales tax of 6 percent was added to the bill to make it 212 work out 6 100 0 06.

Percentage change corbettmaths duration.