Find the ratio: 1.5 hours: 1 hour and 50 minutes = how much.
求比值：1.5小时：1小时50分钟=多少．
<gadget id="calculator">90 / 110</gadget>
<output>9/11 = around 0.818182</output>

<result>9/11 = around 0.818182</result>