In a certain city last year, the smog weather accounted for 20% of the whole year. That is to say, how much (fraction) the haze weather accounted for in the whole year in the city last year. Please calculate the total number of haze weather in a certain city last year.
某市去年雾霾天气占全年的20%．这就是说，该市去年雾霾天气占全年的多少(分数)．请计算出某市去年全年雾霾天气总数．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>