When you select the part of the formula that you want to replace make sure that you include the entire operand. In the Go To Special dialog check Formulas option. Also see examples below.
Press Ctrl H to display Find and Replace dialog.
These are the parameters that you can use in a Replace method statement. Use the REPLACE function when you want to replace text based on a known location. The syntax of the REPLACE function REPLACE old_text start_num num_chars new_text old_text is the cell containing the text you want to replace. Now all formulas have been selected.