Regardless of the rest, I like how this article shows the relationship of it's not the same bet to get back to where you started. I've observed very similar mistakes a number of times in how that % relationship works.
It really reminds me of Eve Online. It's been a many years, but once upon a time when I did play it, we were looking at different sensor jammers. And the ones that looked like the worst were actually the best, because they couldn't be countered. Most worked like a +1/-1, but one applied as a fraction. So if the jammer cut a value by 50%, the counter to it added 50%. But adding 50% doesn't get you back to where you started, the opposite increase is 100%. 20 - 50% = 10. 10 + 50% = 15, not 20.
Another one is for the property I live in, we're pushing back on the government about losing a subsidy of ~33%. The property management company, managers, accountants kept sending letters saying this will cause prices to go up 33%. And I keep having to explain that the notices are wrong, removal of a 33% subsidy increases prices by 50%, not 33%.
It really reminds me of Eve Online. It's been a many years, but once upon a time when I did play it, we were looking at different sensor jammers. And the ones that looked like the worst were actually the best, because they couldn't be countered. Most worked like a +1/-1, but one applied as a fraction. So if the jammer cut a value by 50%, the counter to it added 50%. But adding 50% doesn't get you back to where you started, the opposite increase is 100%. 20 - 50% = 10. 10 + 50% = 15, not 20.
Another one is for the property I live in, we're pushing back on the government about losing a subsidy of ~33%. The property management company, managers, accountants kept sending letters saying this will cause prices to go up 33%. And I keep having to explain that the notices are wrong, removal of a 33% subsidy increases prices by 50%, not 33%.