There are 30 passengers on a bus, and 7 get off when it arrives at a certain station. What is the current number of people in the car as a percentage of the total number of passengers?
一辆公共汽车上有乘客30人，到达某站时下去7人．现在车上的人数占乘客总人数的多少
<gadget id="calculator">30 - 7</gadget>
<output>23</output>

<gadget id="calculator">23 / 30</gadget>
<output>23/30 = around 0.766667</output>

<result>23/30 = around 0.766667</result>