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GC peak area problem

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I have the areas under the peak for unknown and standard + unknown in Gas chromatography. How do you calculate the % analyte?

The unknown areas
Peak 1 Retention time Peak area %AREA
0.980 16.92 3.79%
peak2 3.175 429.71 96.21%
------------
the unknown + Standard ETOH
Peak1 1.045 282.82 80.45%
Peak2 2.715 68.68 19.54%

the mass of the unknow is 0.0467g

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A GC problem based on peak areas is solved.

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