Three kinds of saplings are planted in a nursery, pine, cypress and fir, among which pine saplings account for (3/10), cypress saplings account for (1/6), what percentage of fir saplings account for?
一个苗圃里栽了松树、柏树和杉树三种树苗，其中松树苗占(3/10)，柏树苗占(1/6)，杉树苗占几分之几？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (3/10) - (1/6)</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>