The marked price of an article is kept at 25% above the cost price. If the article is sold at a discount of 8%, find the ratio of its selling price to its cost price.

23 : 40 43 : 40 23 : 20 20 : 23

23 : 20

CP                   MP                 SP        100 ----25% ---125----8%D-----115 SP : CP = 115 : 100 SP : CP = 23 : 20