Correct Answer - Option 5 :
\(1\frac{3}{5}\%\) Loss
Given:
Provider marks up 50% above the CP
Discount % = 20%
GST = 18%
Concept used:
Loss = CP – SP
Loss% = {(CP – SP)/CP} × 100
CP = cost price
SP = selling price
MP = marked price
Calculation:
Let CP of internet plan be 2x
MP = 2x × 150% = 3x
SP = 3x × 80% = 12x/5
According to the question,
The provider has paid GST of 18% on SP
So,
Actual amount got by the provider = 12x/5 × 82/100
⇒ 492x/250
Loss = {2x – (492x/250)}
⇒ (500x – 492x)/250
⇒ 8x/250
Loss percentage = {(8x/250)/2x} × 100
⇒ (8x/500x) × 100
⇒ 8/5
⇒ \(1\frac{3}{5}\%\)
∴ Required loss percentage is \(1\frac{3}{5}\%\)