After offering a discount of 20% on the list price a trader gains 25%. If the discount is increased to 25% approximately what is the gain percentage.

Options...
10.5%
15%
20%
17.2%

• let x be list price...
  after 20% discount selling price=80% of x=0.8x
  by selling item at 0.8x the trader gains 25%
  so 125% of actual cost price=0.8x
  =>so cost price=0.8x*100/125=0.64x
  after 255 discount selling price=0.75x
  so gain%=[(0.75-0.64)x/(0.64)x]*100=[0.11/0.64]*100=17.19%
• 12 years agoHelpfull: Yes(1) No(0)
• let x be list price...
  after 20% discount selling price=80% of x=0.8x
  by selling item at 0.8x the trader gains 25%
  so 125% of actual cost price=0.8x
  =>so cost price=0.8x*100/125=0.64x
  after 255 discount selling price=0.75x
  so gain%=[(0.75-0.64)x/(0.64)x]*100=[0.11/0.64]*100=17.2%...
• 12 years agoHelpfull: Yes(1) No(0)