This is a percentage sign. There is a circle on the left that is slightly higher than the circle on the right. In between is a forward slash dividing them. This is the same symbol you would see to distinguish 1% or 2% Milk
This Percentage icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office
, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,800 icons, all in the same style and quality.