For a parallelogram, if its base is increased (1/4) and its height is decreased (1/3), by what fraction is the area of the obtained parallelogram reduced compared to the original?
一个平行四边形，把它的一组底增加(1/4)，高减少(1/3)，所得到的平行四边形的面积比原来减少了几分之几？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>