A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Select one of the two cells.
Click in the formula bar.
Select the formula without the = at the beginning.
Press Ctrl+C to copy the selection.
Select the third cell.
Click in the formula bar.
Place the insertion point where you want to paste the formula that you copied.
Press Ctrl+V to paste.
Repeat for the other of the two cells.