A shopkeeper bought a chair marked at Rs. 600 at two successive discounts of 15% and 30% respectively. He spent Rs. 30 on transportation and sold the chair for Rs. 620. His gain/loss percent is?

60.20%

CP = 600 × \(\frac{85}{100}\) × \(\frac{70}{100}\) = 357

Total CP (+ transportation Exp.)= 357 + 30 = 387

SP = 620                              

Profit - 620 - 387 = 233

Profit percent = \(\frac{233}{387}\) × 100% = 60.20%