The most percentage?

The pie graph shows how the price of every course should be shared, measured in percentages. Overall the numbers are not that different for each part. Individual has the most percentage at 40%, followed by employer at 35%, and taxpayer has the least percentage at 25%.

Although I know we usually use high/low with percentages, I'm still curious whether more/less with percentages are also acceptable?

As pointed out by user240918, "most percentage" is not common, but I was surprised to see that there were any hits at all for "most percentage" or "least percentage" on an ngram. There are a few legitimate examples, where the author wrote a sentence including "most percentage" like in this book, but from what I can tell, the majority of that minuscule number of hits comes from books like this, where the words appear together my a matter of coincidence. While there are still very few instances of "least percentage," there are many more, like here, here, and here. I hesitate to say most and least percentage are 100% wrong since they are attested and they may be acceptable among some groups, but they certainly sound wrong to my ear.