By selling a tie for rupees 252 A shopkeeper gains 25% at what price should he sell the tie to gain 35%

Let the Cost Price be Rs a
Gain percent = 5 %
Selling price = 252
=> Cost Price + Gain = 252
=>a + 5 % of a = 252
=> a + 5a/ 100 = 252
=>a + a/20 = 252
=>21a/20 = 252
=>a = 252 ? 20 / 21
=>a = 12 ? 20
=>a = 240

Cost Price = Rs 240
Now,
To get 35 % Gain,
Selling price = Cost Price + 35% of Cost Price
SP = 240 + 35? 240 / 100
SP = 240 + 7 ? 12
SP = 240 + 84
SP = Rs 324
To get 35 % Profit, he should sell the tie in Rs 324