The original average price of a commodity is a yuan, which was raised by 20% in January, dropped by 20% in February, and raised by another 20% in March. The average price of this commodity has increased by a percentage from the original price to the end of March Several?
某种商品的原平均价格为a元，一月份上调了20%，二月份下降了20%，三月份又上调了20%，问这种商品从原价到三月底的价平均上涨了百分之几？
<result>0.152</result>