If the sides of a triangle are tripled, the area of the new triangle is what percent of the area of the old triangle?
\(A:100\%=3^2 \cdot A:x\\A\cdot x=9 \cdot A \cdot 100\%\\x=900\%\)
The area of the new triangle is 900 percent of the area of the old triangle.
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+647 
