According to statistics from the Lankao County Meteorological Observatory, in February this year, there were 6 cloudy days and 4 snowy days. What percentage of cloudy days are snow days? What percentage of the number of days in the month do cloudy days and snowy days account for?
据兰考县气象台统计，今年年2月份，阴天有6天，雪天有4天，阴天是雪天的几分之几？阴天和雪天各占这个月天数的几分之几？
<gadget id="calculator">4 / 28</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>