SET /A "var%=N", TCC vs. CMD

[vefatica]

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

v:\> set z=8

v:\> set /a "z%=2"
0
v:\> set z
z=0

TCC  16.03.55  Windows 7 [Version 6.1.7601]

v:\> set z=8

v:\> set /a "z%=2"
10

v:\> set z
8