3% or 3÷ ？

Being said that only 3% of the world can understand the following figure…
I forward it because I don't understand…
據說全世界只有3%的人能看懂下圖…
因為看不懂，只好轉發…

Do you guys understand what does it mean?
你們能看懂嗎？

From: Sina Weibo