this post was submitted on 11 Apr 2025
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Funny: Home of the Haha
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If you increase something by 10% you’re doing this:
(10% • X) + X
(.1 • X) + X
1.1 • X
So you’re just multiplying the original value by 1.1. Similarly for subtracting 10% you’re multiplying by .9
So the order in which you add or subtract 10% doesn’t matter. You always get the same number.
I have 100 dollars. I lose 10% of it. I now have 90 dollars. Now I increase my 90 dollars by 10%. Is it your assertion that 10% of 90 is 10?
No. Because increasing 90 by 10% is:
90 • 1.1 = 99
Percentage is relative to current value, not previous calculations. 10% of 90 is 9.