$276.21 - 20% = $220.968 So not far off from $226 $226 / $276.21 = 81.8% So its 18.2% to be exact Edit: Realized the quote/article says 20% LOWER. Which is

$276.21 - 20% = $220.968 So not far off from $226 $226 / $276.21 = 81.8% So its 18.2% to be exact Edit: Realized the quote/article says 20% LOWER. Which is backwards, and is likely what my parent comment is pointing out