Hi
I have the following example:

What I want to achieve is the ability for the user to input the value in C1 and the cell B1 gets update or they simply enter the %age in B1 and C1 is calculated.
So the user has the option to either enter %age in B1 or Enter the Value in C1 and B1 gets updated.

A1 B1 C1
100 10% 10

Thanks