Answer: the correct answer is 56% of the original price.
Explanation: Let's say the original price is 100 - (0.20*100) = 80. the price is now 80 with the discount. The new discount is now 80- (0.30*80) =80-24 = 56. If 100 is 100%. How much is 56 of 100 in terms of percentage and the answer is 56%.