"joeu2004" wrote:
Sub RoundSelection()
Const pctChange As Double = 0.07 ' for 7%
Dim Cell As Range
For Each Cell In Selection
Cell = WorksheetFunction.Round(Cell*(1+pctChange), 2)
Next Cell
End Sub

If you would like the flexibility of putting the percentage change into a
cell, obviating the need to alter the macro, you could write:

Sub roundSelection()
Dim pctChange As Double
Dim Cell As Range
pctChange = Range("pctChange")
For Each Cell In Selection
Cell = WorksheetFunction.Round(Cell * (1 + pctChange), 2)
Next Cell
End Sub

To use the macro:

1. Enter 7% into some cell. (Enter -7% for a percentage decrease.)
2. With that cell selected, enter pctChange into the Name Box (upper left).
3. Select the data to be modified.
4. Press alt+F8 and run the macro roundSelection.
5. You can now delete the value in the cell used for #1.

Note: If you have already done this once and you want to use a different
cell for #1, you should use the Name Manager to delete or alter the previous
"refers to" for the name pctChange. For Excel 2007, click on the Formula
tab, then Name Manager.