DIV 80% transparent background

<div style="background-image: url(http://3.bp.blogspot.com/-HiZSUjHk_Nk/VOuxquW-qZI/AAAAAAAACqE/l99yFUHXRYk/s1600/SwedishWebDesign_White%2B16x16px_80procent.png); padding: 25px;">

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</div>