Here's another picture of the bottom stair stringer
layout that's going to be connecting to a concrete building foundation.
Make sure that you deduct the stair tread width and any other building
materials (treated lumber) from the bottom of the stair stringer, before
making any cuts.
Always double check everything. It wouldn't be a bad idea to cut one
stair stringer and place it into position, to make sure that everything
is going to work out correctly, before cutting any more stringers.
Split Level Stair Framing