Heres the thing you gotta understand about statistics.
“Increases your chances by 80%” does not mean “there is now an 80% chance”.
If your chances were previously 10%, your chances are now 18%, not 90%.
if your chances were roughly 1%, they’re now just slightly less than 2%.
thats how that works.
Wow I don’t understand math at all
‘if you have a baby after 35, the chance of deformities goes up by 100%’ is a line I hear alot.
It goes up from .5% to 1%
To simplify: It’s the percent amount of the current factor.
In the starting example: 10% is the factor. 80% of 10 is 8, and then add together (increase by that): 10 + 8 = 18. Thus an 80% increase of 10% is 18%.
Similarly: 1% is the factor, it’s really the same as 10, just the decimal stepped over (10.0%, 1.00% // I know that isn’t really how numbers work, I’m just doing this for the visual). And thus, 80% of 1% then adding it on would be basically 1.8%
And finally, .5%. 100% of .5 is just that, ‘point 5′, or a half a percent. Two halves make a whole, and thus a single percent or ‘1%’.
Pretty easy to be honest… Though, it’s easy to get caught up in the statement and forget that, sometimes even when you know better.
Practical, every day use of maths: Not being dooped by dipshit marketing teams