The elder brother and the younger brother share a piece of chocolate, the elder brother eats (5/8) of this piece of chocolate, and the younger brother eats all the rest. By what percentage of the chocolate did the elder brother eat more than the younger brother?
哥哥和弟弟分吃一块巧克力，哥哥吃了这块巧克力的(5/8)，剩下的弟弟全部吃完．哥哥比弟弟多吃了这块巧克力的几分之几？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>