On the "Six Days" Day, Xiao Li used his beloved "365 Night Stories" as a charity sale in the "Love Charity Sale" held in the fourth and fifth grades of the Xishi Attached Primary School. The original price was 50 yuan. Yuan, what percentage of his charity sale price is the original price?
"六一"节那天，小李在锡师附小四五年级举行的"爱心义卖"活动中，把自己心爱的《365夜故事》上下册作为义卖商品，原价是50元，这一次他义卖价是10元，他的义卖价是原价的百分之几？
<gadget id="calculator">10 / 50</gadget>
<output>1/5 = around 0.2</output>

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