Subnetting an address space to two equal networks

I would like a solution for this question:

Use the address space and split this address space into two equal sized networks by subnetting it again.

I am confused on how to do it. Can someone help me please? Thanks
Asked Oct 21, 2013
The total address space is to

Two equal sub-nets will be: and

The addresses for usable hosts on these sub-nets are: to and to

The sub-net mask for both sub-nets is
Answered Jan 25, 2014

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