A village uses (1/4) of the total land area to grow vegetables, (3/5) to grow grain, and the rest to grow fruit trees. What percentage of the total area is the area planted with fruit trees?
某村用土地总面积的(1/4)种蔬菜、(3/5)种粮食，其余的种果树．种果树的面积占总面积的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/4) + (3/5)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>