A shopkeeper sells his items using a faulty balance which measures 25% less. He then marks up his items 15% above the cost price. If he also gives a discount of 10%, then find his net profit percentage on 1 kg items.

38%

Let all the quantity/Total = 1000

ATQ,

ActualCost of quantity       Total                       MP                        SP

750(25%Less)-------------1000 ------+15%-----1150-----(-10%)----1035

Profit = 1035 - 750 = 285

Profit% =  \(\frac{285 × 100}{750}\) = 38%