Mom cuts a birthday cake into 8 parts on average, Xiao Ming eats 3 parts, what percentage of the whole birthday cake is the remaining cake?
妈妈把一个生日蛋糕平均切成8份，小明吃了其中的3份，剩下的蛋糕占整个生日蛋糕的百分之几？
<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

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