A persons salary iis decreased by steps of 20%, 15% and 10%. What will be the percentage decrease, if the
salary is decreased in a single shot?

• 38.8%
  Solution:
  Let x is his initial salary.
  After 1st decrease, x1 = x- (x*20/100) = x - x/5 = 4x/5
  After 2nd decrease, x2 = 4x/5 - ((4x/5)*15/100) = 4x/5 - 3x/25 = 17x/25
  After 3rd decrease, x3 = 17x/25 -((17x/25)*10/100) = 17x/25 - 17x/250 = 153x/250
  So if its decreased in single shot, x - y(decreased) = 153x/250
  => y = x - 153x/250 => y = 97x/250 => y = 0.388x => y = 38.8%
• 13 years agoHelpfull: Yes(18) No(4)
• If Initial salary is x, final salary is
  x*0.8*0.85*0.9 = 0.615 x
  reduction in salary = 0.385 x
  
  so percentage reduction = 38.5%
• 13 years agoHelpfull: Yes(14) No(4)
• let the salary be rs100
  90%of 85% of 80%=(0.9*0.85*0.80)*100
  =61.2 hence in single shot 100-61.2=38.8%
• 9 years agoHelpfull: Yes(1) No(0)