Hi,
in the cell where you want the result enter
to increase

=A1*1.15

to decrease

=A1/1.15

"Shevvie" wrote:

I want to be able to create a forumla to increase or decrease the percentage
of a whole number i.e. Nett: 81.47 increase by 15% to give me the total and
vice versa 92.27 decrease by 15% (I can do this on the calculator). Formula
NOT reliant on other cells.

Appreciate your help