The final ratings for The 100 DNR are in, and you can see them below.
The previous episode, God Complex, (#408) which aired March 29th, received a 0.3 in the 18-49 demo and 0.97 in viewership.
The 100 DNR received a 0.3 in the 18-49 demo, and 0.81 in viewership.
In some US cities, there were preemption due to baseball events, so it was not even aired. Plus, ratings sometimes drop from hiatuses. The good news is that it is steady, but hopefully it will improve. This season has been fantastic, and I hate to see it get unappreciated.