Given: On selling an article for Rs. 800, the loss is 1/8 of the profit which is received on selling the article for Rs. 890. Calculation: Let the cost price of the article be ‘x’ ⇒ (x−800)=(
1
8
)(890−x) ⇒ 8x - 6400 = 890 - x ⇒ 9x = 7290 ⇒ x = 810 ∴ Cost price of the article = Rs. 810