ANSWER:
The area is multiplied by 1/3
STEP-BY-STEP EXPLANATION:
We have that the area of a rectangle is defined as follows:
[tex]A=b\cdot h[/tex]
Now, we know that the base is 1/3 of the original base, so the new area would be affected like this:
[tex]\begin{gathered} A^{\prime}=\frac{1}{3}b\cdot h \\ A^{\prime}=\frac{1}{3}(b\cdot h) \\ A^{\prime}=\frac{1}{3}\cdot A \end{gathered}[/tex]
Therefore, the area is multiplied by 1/3
