Question

how much percent above the cost price should a shopkeeper marks his goods so that after allowing 10% on the marked price he gains 8%​

Answer 1

$\huge\mathfrak\red{Solution:}$

Answer is 18.8%

Explanation:-

Let the cp be x
for a gain of 8% the profit will be 0.08x
so, sp will be x+0.08x=1.08x

Now to give discount of 10 %
marked price will be 1.08x + 10% of 1.08x
or, 1.08x+0.1×1.08x
= 1.08x+0.108x =1.188x

So,
the required percentage will be 1.188x-x /x ×100
i.e., 0.188x/x ×100=18.8%