Answer / sabarish

let no be x.
let actual ans be 7x
new ans = x/7

error=7x-x/7 = 48x/7

percentage = (48x/7)/7x * 100 = 97.9% = (d)

Answer / guest

( d ) 97.9%

Answer / aish

97.9%

Answer / $onal m. bhalerao

consider any nember Let  i considers that number as 4
 actual answer is 28
 by dividing is 0.57
 
 %error is=(28-0.57)/28*;
          =98.7

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