Father, mother, and Xiaoling share a watermelon together. Xiaoling eats (2/8) of the watermelon, father eats (3/8) of the watermelon, and what percentage of the watermelon does mother eat?
爸爸，妈妈，小铃一起分一个西瓜，小铃吃这个西瓜的(2/8)，爸爸吃这个西瓜的(3/8)，妈妈吃这个西瓜的几分之几？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (1/4) - (3/8)</gadget>
<output>3/8 = around 0.375</output>

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