Trying to create a formula to calculate percentage

[AnitaAus.]

Hi,

I'm am looking for someone to be able to help me build a formula calculation.

I need to be able to enter a manual amount up to the value of 100 in cell, that then a formula in the cell below to calculate the percentage, the example is as follows;

100 = 6%

50 = 3%

I hope that is clear? Thanks everyone