\[8\%+.5\%\]

1
Simplify  8%8\%  to  0.080.08.
0.08+.5%0.08+.5\%

2
Simplify  .5%.5\%  to  0.0050.005.
0.08+0.0050.08+0.005

3
Simplify.
0.0850.085

Done

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