(3/8) of a piece of rectangular paper is painted red, (2/8) is painted blue. What fraction of the rectangle of paper is uncolored?
一张长方形纸的(3/8)涂红色，(2/8)涂蓝色．没涂色的部分占这张长方形纸的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/8) + (1/4)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

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