If 70% of a no. is subtracted from itself it reduces to 81.what is two fifth of that no.?
108 54 210 none

• 108
  
  If no is x, then
  
  0.3 x= 81
  x= 81/0.3 = 270
  270*2/5 = 108
• 12 years agoHelpfull: Yes(30) No(0)
• 108
  
  Suppose n is used to represent the number.
  70% of n = .7n
  
  n - .7n = 81
  n = 81/.3
  Therefore, n= 270.
  2/5 of 270 is,
  = 2/5 * 270
  = 108
• 12 years agoHelpfull: Yes(12) No(0)
• x-(70/100)x=81
  so x=270
  now (2/5) of 270(X)
  so answer is 108.....
• 10 years agoHelpfull: Yes(3) No(0)
• Suppose n is used to represent the number.
  70% of n = .7n
  
  n - .7n = 81
  n = 81/.3
  n=810/3=270
  then, n=270
  two fifth of that no.
  =2/5*270
  =2*54
  =108.
  
• 7 years agoHelpfull: Yes(0) No(0)
• 100% of no =x
  so 70% is redused so the remaning 30% of x =81
  30/100x=81
  x=270
  2/5 of 270
  108
  
• 7 years agoHelpfull: Yes(0) No(0)
• 70% of x = 70*x/100 =7*x/10
  therefore x- (7*x)/10 =81
  => x= 270
  therefore 2/5 of x = (2/5 )*270 = 108
  ans is 108
• 6 years agoHelpfull: Yes(0) No(0)
• x-70% of x=81
  30x/100=81
  x=270
  270*(2/5)=108.
• 5 years agoHelpfull: Yes(0) No(0)