A flower cultivation base plans to use (2/5) of the total area to plant roses, (1/3) to plant chrysanthemums, and the rest to plant lilies. What percentage of the total area is planted with lilies?
一个养花基地，计划用总面积的(2/5)种玫瑰花，(1/3)种菊花，其余的种百合花．种百合花的面积占总面积的几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>