A person buys a pair of jeans for Rs. 800 and sells them for Rs. 640. What is the loss percentage? MCQ with Answer and Explanation

Explanation:
Let original price = P. Reduced price = 0.9P. (450 / 0.9P) - (450 / P) = 5. (500 / P) - (450 / P) = 5. 50 / P = 5. P = 10.

Explanation:
Let A's Cost Price = 100x. B's Cost Price = 120x. C's Cost Price = 120x * 0.85 = 102x. D's Cost Price = 102x * 1.25 = 127.5x. Difference = 127.5x - 100x = 27.5x. 27.5x = 137.50. x = 5. A's Cost Price = 100 * 5 = 500.

Explanation:
Let original CP = x. Original SP = 1.2x. New CP = x - 100. New SP = 1.2x - 100. New profit = 25%. So, 1.2x - 100 = 1.25(x - 100). 1.2x - 100 = 1.25x - 125. 0.05x = 25. x = 500.