if the price of an item is decreased by 10% and then increased by 10% the net effect on the price of the item is :
a)a decrease of 99%
b)no change
c)a decrease of 1%
d)an increase of 1%

• c) decrease of 1%
  If initial price is 100,then first decrease by 10% & then increase by 10% =100*(90/100)*(110/100)=99, which is 1% less than 100
• 11 years agoHelpfull: Yes(31) No(3)
• Let me make it simple.
  Suppose x=100;
  Decreasing by 10% we have, x=90;
  Now increasing by 10% we have, x= x + 10% of x = 90 + 9 = 99
  100-99=1 = 1 % of 100 = Decrese of 1 %
• 11 years agoHelpfull: Yes(22) No(2)
• in this type of problem in which incresing and decreasing by same percent ,then there is always loss and there is simple formula for this
  (rate)^2/100......>(10)^2/100=1% loss
  as i earlier told in this type of case always decreasing so option c)a decrease of 1% is right(ans)
• 11 years agoHelpfull: Yes(13) No(1)
• OPTION C IS THE ANSWER.CONSIDER THE ITEM COSTS 100. 10% DECREASE RESULTS IN 90. NOW 10% INCREASE RESULTS 99. HENCE DECREASE IS THERE (1/100)*100=1% DECREASE.
• 11 years agoHelpfull: Yes(5) No(0)
• (x/10)^2=(10/10)^2=1%and always decrease
• 11 years agoHelpfull: Yes(3) No(0)
• Loss%=(Common loss and gain %/10)^2 = (x/10)^2.
  Here, Loss%=(10/10)^2 =1^2
  Ans: c) Decrease of 1%
• 8 years agoHelpfull: Yes(2) No(0)
• If a certain number is increased by x% then decreased by x% or vice versa, the net change is always decrease. This change is given by a simple formula − (x⁄10)2 = − (10⁄10)2 = −1 %. Negitive sign indicates decrease.
• 5 years agoHelpfull: Yes(1) No(0)
• Let initial price be x.
  After decrease of 10% price of item=x-10%of x=0.9 x
  Then after increasing by 10%,price of item =0.9x+10%of x=0.99x
  Therefore,
  Total decrease=0.01=1%
• 8 years agoHelpfull: Yes(0) No(0)
• formula: x^2/100
  = 10^2/100
  = 100/100
  = 1
  percentage change gives always decrease so, 1% decrease
• 8 years agoHelpfull: Yes(0) No(0)
• -10+10*(-100/10)=-1 SO THAT PRICE DECRREASES OF 1 %
• 8 years agoHelpfull: Yes(0) No(0)
• Let initial price be 100x.
  So final price=110/100 * ( 90/100 * 100x) = 99x.
  Therefore answer is (c) decrease of 1%
• 8 years agoHelpfull: Yes(0) No(0)
• c. decrease of 1%.
• 8 years agoHelpfull: Yes(0) No(0)
• c since initially it is 100 then 10% decrease is 90% and then increase of 10% in 90% is 9% so 99% we get and the from total 100% we are getting 99% finally theerefore 15 decrease
• 8 years agoHelpfull: Yes(0) No(0)
• C-C*(90/100)*(110/100)
  
• 8 years agoHelpfull: Yes(0) No(0)
• let the prive will be x,
  then by decreasing 10% , it will become x-10%of x = 0.9x ;
  now by increasing by 10%= 0.9x+10% of 0.9x=0.99x;
  .
  therefore now.... x-.99x=0.1x
  it is decrease by 0.1 means 1%
• 7 years agoHelpfull: Yes(0) No(0)
• c.
  let the initial price be 100
  1. after 10%decrease, price=90
  2. after 10% increase , price = 90+9=99
  
  net change= 100-99= 1%
• 7 years agoHelpfull: Yes(0) No(0)
• c
  -10% of 100=90/-(let cp be 100/-)
  +10% of 90=99/-
  i.e. net decrease is 100-99=1%
• 7 years agoHelpfull: Yes(0) No(0)
• let's discuss about the answer if u assume one ball is 100 rs
  decreased by 10% then the ball rate is 90rs
  then after increased 10% then the ball rate 99, the net is 100 ...then it is decreased by 1%
• 7 years agoHelpfull: Yes(0) No(0)
• decreased by 10% i.e -10
  increased by 10% i.e +10
  net effect= -10+10+[(-10)(10)]/100=-1
  therefore it is decrease of 1%
• 7 years agoHelpfull: Yes(0) No(0)
• a decrease in 1%
  X^2/100
  10^2/100=100/100=1 decrease in 1%
• 6 years agoHelpfull: Yes(0) No(0)
• 10-10+(10*-10)/100=-1
• 6 years agoHelpfull: Yes(0) No(0)
• Suppose price of item is 100rs
  1) If the price is decreased by 10% updated price of item is 90rs.
  2) Now price is increased by 10% so 10 per cent of 90 is 9 New value is 90+9=99.
  Initially price was 100rs after up and downs in price current price is 99.
  So 1% of 100 is 1 so price is decreased by 1%.
• 6 years agoHelpfull: Yes(0) No(0)
• Let the price is Rs.p
  So, for decrease
  P*(1-10/100)=90p/100
  For increasing 10℅
  90p/100*(1+10/100)=99p/100=p(1-1/100)
  Which is showing 1 ℅ decrement
• 5 years agoHelpfull: Yes(0) No(0)
• let price be 100 initially,
  so after 10% decrease price will be 100-(100*10%)=90,
  then after 10% increase price will be 90+(90*10%)=90+9=99
  thus final value is 99 where as initial value is 100,
  therefore option c)decrease in 1% will be right answer
• 4 years agoHelpfull: Yes(0) No(0)