Explanation:

Let the cost price of an article be 100.
Marked price = 100 $$\times$$ 125/100 = 125
Discount = x%
Loss = 8%
Selling price = 100 $$\times$$ 92/100 = 92
Selling price = marked price - discount
Discount = 125 - 92 = 33
x% = $$\frac{33}{125}\times 100$$ = 26.4%