Looking out from the window of the plane, Archie saw part of the island, part of the white clouds and a small piece of sea. Among them, the white cloud occupies half of the window screen, and it covers (1/4) of the entire island, so the island only occupies (1/4) of the window screen. Excuse me: the part of the ocean covered by the white cloud occupies 1/4 of the window screen What percentage?
从飞机的窗口向外望去，阿奇看见部分海岛、部分白云以及不大的一片海域．其中白云占去了窗口画面的一半，它遮住了全部海岛的(1/4)，因此海岛只占窗口画面的(1/4)，请问：被白云遮住的那部分海洋占窗口画面的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/4) / (3/4)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>