Question

the iPhone was market at 40% above the cost price and a discount of 30% was given its market price find the gain or loss percent made by the store

Answer 1

Let cost price be 100 then marked price = 100 + 40 x 100 / 100 = 140

Now discount = 30 % 0f 140 = 30 x 140 / 100 = 42
Hope this helps you !!