An article is sold at a certain price. By selling it at 2/3 of that price one loses 10%. Find the gain percentage at original price:

35%

We have,

By selling it at 2/3 of that price one loses 10%

Let SP = 2

and Original price = 3

Loss = 10%

So, 90% of CP = 2

then, 100% CP = 20/9

The profit when he sells at Original price = 3 - 20/9 = 7/9

Profit% = 7/9 × 100 × 9/20 = 35%