0.54 percent. Negligible, in most contexts. Any number that leads with a zero is practically doomed to be lost in the pool of insignificance. And is that a bad thing? No, not usually. Our mind cannot possibly retain every number that we read, every detail that we hear, every graphic that we observe. If we did, those numbers, those details, and those graphics would all be shoved in the corners of our brain, reduced because of their lack of abnormality. So either way, 0.54 gets registered as worthless.