The profit on selling an article for ₹1,100 is equal to three times the amount of loss on selling it for ₹700. To gain 12.5%, the article must be sold for:

₹900

First S.P. = 1100

Second SP. = 700

Let CP = m

According to the question

(1100 – m) = 3 (m – 700)

1100 – m = 3m – 2100

3m + m = 2100 + 1100

4m = 3200

m = 800

SP of the article = 800 × \(\frac{9}{8}\) = Rs. 900