A number is mistakenly divided by 10 instead of being multiplied by 10. What is the percentage change in the result due to this mistake? 

{Please provide only experts answer and don't provide any web link or certified answer} 

let the number be x.
the resultant = x/10
the required result = 10x
error = 10x - x10=99x10

percentage error =
=99x1010x×100 = 99x100x×100= 99% 


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