The ratio of cost price and selling price is 5:4 then loss percentage is :

Step 1: Let the cost price (CP) be 5x and selling price (SP) be 4x, based on the given ratio 5:4.

Step 2: Calculate loss: Loss = CP - SP = 5x - 4x = x.

Step 3: Calculate loss percentage: Loss% = (Loss / CP) × 100 = (x / 5x) × 100 = 20%.

हिन्दी उत्तर:

चरण 1: दिए गए अनुपात 5:4 के आधार पर, क्रय मूल्य (CP) को 5x और विक्रय मूल्य (SP) को 4x मानें।

चरण 2: हानि की गणना करें: हानि = CP - SP = 5x - 4x = x।

चरण 3: हानि प्रतिशत की गणना करें: हानि% = (हानि / CP) × 100 = (x / 5x) × 100 = 20%।