A watermelon weighs 8 kilograms. Xiaohong ate (1/8) of the watermelon, and mother ate (1/4) of the watermelon. What fraction of the watermelon is left?
一个西瓜重8千克，小红吃了这个西瓜的(1/8)，妈妈吃了西瓜的(1/4)，这个西瓜还剩几分之几？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

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

<result>5/8 = around 0.625</result>