其它
The base of a triangle increases by $30\textbackslash\%$ and its height decreases $20\textbackslash\%$ at the same time. The area of the new triangle is~\uline{~~~~~~~~~~}~$\textbackslash\%$ of the original triangle. 
Overseas Competition->Knowledge Point->Calculation Modules->Percentage Calculation
$1.3\times 0.8=1.04$ 