Sorry but stuck on stupid on this one.
If I have a random number – let’s say 545 and I reduce it by 20%. It’s reduced by 109 making it 436.
But if I want to increase it back to 545 I have to add 25%
Edit: Ahhhh Thank you all for this! Makes perfect sense now!
In: Mathematics
It struck me when you think about what you’re actually doing when you do percentages, which is multiplying by a decimal and that the opposite of multiplication is division.
So…
545 * 0.8 = 436
436 / 0.8 = 545
and dividing something by 0.8 = multiplying by 1.25 which is what causes the confusion.
1 / 0.8 = 1.25
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