The logo used 2/7 of the allotted space, which is 0.285, or 28.5% of the space.
The information used 1/10 of the allotted space, which is 0.1, or 10% of the space.
The logo then used 0.285 / 0.1 or 2.85 times as much space. The value 2.85 converts to 285% more space.