Xiaoli's family of three shared the cake. Xiaoli ate this cake (3/8), and her mother ate as much as Xiaoli. What fraction of this cake did dad eat?
小丽一家三口分蛋糕．小丽吃了这个蛋糕的(3/8)，妈妈吃的和小丽同样多．爸爸吃了这个蛋糕的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) + (3/8)</gadget>
<output>3/4 = around 0.75</output>

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

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