How does Subnetting Work?
what is the last valid host on the subnetwork 192.168.176.200/30 and how did u get ur answer
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
How Does Subnetting Work Take a look at the mentioned post. It should answer your questions.
For reference though:
However, I HIGHLY suggest reading the "How Does Subnetting Work" post.