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
In math the reciprocal of a number is 1 divided by the number. the number times it’s reciprocal is equal to 1. when you reduce a number by 20% you are multiplying it by (1-0.20) or 0.80
Therefore 545*0.80*(1/0.80) = 545. (1/0.80) = 1.25.
this is also to say 4/5 = 0.80 and 5/4 = 1.25.
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