How to calculate the original amount after a percentage change from [ Ссылка ]
The full lesson includes a starter, 2 mains, plenary and a worksheet. Members of Mr Mathematics can download this from [ Ссылка ].
For regular updates about new lessons and videos:
Follow me on Twitter: @Mr_Mathematics
Like me on Facebook: @GCSEMathsLessons
![](https://i.ytimg.com/vi/ohgr9Yy6sec/maxresdefault.jpg)