Using the data below, what is the value of the Mean absolute percent error $($MAPE$)?$

$\backslash$table$[[$Week Time Series Value,Forecast,$],[1,17,3\mathrm{.}89],[2,25,26\mathrm{.}90],[3,14,12\mathrm{.}43],[4,23,22\mathrm{.}19]]$

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Answer format: Number: Round to: $2$ decimal places.