Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: the length of a rectangle is increased by 20 % and its breadth is decreased by 20 % . what is the effect on its area ?
9600
The area is decreased by approximately 16.0 %.