A shopkeeper claims that he is selling sugar at Rs.27/kg which cost him Rs.30/kg, but he gives 750 grams instead of 1000 grams. What is his profit or loss percentage?

20% profit

Concept,

Cost=             30             27

Weight=          750            1000

Cost=             10           9

Weight=          3           4

                ———————————

                    30          36 = 6 PProfit

Profit% = 6 × \(\frac{100}{30}\) = 20%