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

• decrease in salary in single shot =38.8%
  first decease =20% let the salary be 100 then it will become 80
  2nd decrease is= 15%. 15% of 80 =12 then salary become 68
  3rd decrease is of 10% . 10% of 68 =6.8.then salary become 61.2
  so overall decrease=38.8%
• 11 years agoHelpfull: Yes(35) No(0)
• salary after 3 steps of decrease = x*(.8)*(.85)*(.9) = .612 x
  decrease in salary = x-.612 x=.388
  i.e 38.8% of decrease in single step
• 11 years agoHelpfull: Yes(13) No(1)
• ans 38.8%
  
  Explanation:
  given that salary decreased by 20%,15% and 10%
  
  using percentage change graph
  let salary will be 100
  1st decrease is 20% then 100 become 80
  2nd decrement 15% then 80 become 68
  3rd decrement 10 the 68 become 61.2
  
  so 100-61.2=38.8
  so decrement in single shot is 38.8%
• 11 years agoHelpfull: Yes(7) No(0)
• since the percentage is decreasing so
  (-20-15+300/100)=-35+3=-32%
  then (-32-10+320/100)=-42+3.2=-38.8%
  minus sign indicates decrease of 38.8%
• 10 years agoHelpfull: Yes(4) No(0)