[freshpots]

https://www.stat.fi/meta/kas/prosentti_vs__p_en.html

"Per cent means one hundredth of something. Percentage point is used when comparing percentages to one another. For example, when inflation drops from three to two per cent, inflation decreases by one percentage point and 33.3 per cent."

[ksaj]

This is a nice simple explanation of it. It's also why stock holders use "points" instead of "dollars." A stock share going up $1.50 is amazing if it was a penny stock, and absolutely not worth mentioning if it was say, Tesla. But the points have the same meaning for either stock - one is just a lot higher of a point than the other, even though the dollar change was the same.