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
all correct answers but to make it even simpler than some of these, to get back to your original value you just do the opposite operation
545 reduced by 20% could be written as 545*0.8 = 436
you do the opposite operation….436/0.8 = 545
or
545 – (545*.2) = 436, which the opposite is 436 + (545*0.2), where you are “adding back” 20% of the original value (which is what you took away in the first place)
dividing by 4/5 is the same as multiplying by 5/4
Latest Answers