A discount of 10% on one article is equal in amount to a discount of 25% on a second article. What can be the ratio of their marked prices?

Question: A discount of 10% on one article is equal in amount to a discount of 25% on a second article. What can be the ratio of their marked prices?

Solution:
Let
the marked prices of the two articles be X and Y

ATQ,
10% of X = 25% of Y
⇒ 10X/100 = 25Y/100
⇒ 10X = 25Y
⇒ X/Y = 25/10
∴ X : Y = 5 : 2

The ratio of their marked prices is = 5 : 2