after allowing a discount of 11.11%, a trader still makes a gain of 14.28%. at home many percent above the cost price does he mark on his goods?

Let us assume that market price is Rs 900
Now the discount of 11.11 % is nothing but (1/9) of the marked price
Hence, the discount would be Rs 100
And the selling price would be Rs (900-100=800)
Now, the profit percent of trader is 14.28 % which is nothing but (1/7) of the cost price
Hence, cost price +profit=selling price
cost price + (1/7)* cost price=800
cost price * (8/7)=800
cost price= Rs 700
Now, the marked price was Rs 900 and cost price was Rs 700
So, Markup percentage will be = [(900-700)*100]/700=28.57 % (approx)

28.56 percent?