2012 ACS 1-year estimates are now available

The triangles in the upper left means that excel recognizes a problem, most likely that the cells are numbers, but that excel is reading them as text. So if you use the arrow keys to move the cursor over the cell (not mouse over the cell), you should see a diamond with exclamation point to the left. If you click on that, excel should offer you options like change the text to numbers. If you highlight all the cells, you can change them all at once.

The triangles in the upper left means that excel recognizes a problem, most likely that the cells are numbers, but that excel is reading them as text. So if you use the arrow keys to move the cursor over the cell (not mouse over the cell), you should see a diamond with exclamation point to the left. If you click on that, excel should offer you options like change the text to numbers. If you highlight all the cells, you can change them all at once.