The school has a rectangular flower bed. It is planned to use (1/4) of the flower bed to plant roses, (3/8) to plant roses, and the rest to plant rhododendrons. What percentage of the flower bed is the area for rhododendrons?
学校有一个长方形花坛，准备用花坛的(1/4)种玫瑰花，用(3/8)种月季花，剩下的种杜鹃，种杜鹃的面积占花坛的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/4) - (3/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>