If it was priced at $100 and had 30% off, it would cost ($100 - (30% of $100)) =$70. If there was an additional 20% off, it would cost ($100 - (30% of $100) - (20% of 30% of $100)) = $56. So the total savings is (100-56)/100=44%. For $74.99, the answer is the same but the numbers are slightly different, (74.99 - (30% of 74.99) - (20% of 30% of 74.99))/74.99 = 44%.
