The document provides information and examples on calculating percentages of change, markups, and discounts. It gives the formula to calculate percent of change as (New - Original) / Original. It defines markups as price increases and discounts as price decreases. It provides steps to calculate markups by taking the original price, finding the markup amount using the given percentage, and adding that amount to the original. The same steps are used for discounts, but the discount amount is subtracted from the original price. An example problem at the end calculates the final price of a coat that was originally $75, marked down 10% and then an additional 30% off, plus 9.75% sales tax in Tennessee.