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5a. Okay. So $90 were paid for the two tickets, that's $45 per ticket. 452.50 was the amount per ticket. First, let's subtract 45 from 52.50. 52.50 - 45 is 7.5. That's $15 for two tickets, and $7.50 of a markdown per ticket.
5b. For this all we have to do is divide the difference by the original price. Let's do the cost per ticket. There is a difference of 7.5. The original price was $52.5. 7.5/52.5 is 0.142857 and other numbers behind it, or 14% when converted to percent and rounded to the nearest whole number. You can divde the difference for two tickets by the original price for two tickets and get the same answer. There. The percent markdown is approx.14%.
For this part, in order to find the sale price, what we have to do is subtract the markdown from 100%, and then multiply the remainder by the original price. This is because while you do get a discount, you still have to pay a portion of the original price.
6a. The discount is 35%. That means you pay 65% of the original amount, because 100 - 35 is 65. Let's multiply. 4,200 * 65% (0.65) is 2,730. There. The sales price is $2,730.
6b. The discount is 44%, 100 - 44 is 56. So 56% of the original price is paid. Once again, multiply the percent and the original price together. 5,000 * 56% (0.56) is 2,800. There. The sale price is $2,800.