Percentage Markup. Percentage markups are important in a variety of settings because they calculate the percent of a value that can be added to the original value. In a retail environment, an item that is purchased for $5.00 with a percentage markup of 25 percent should be sold for $6.25.Sales tax is calculated in a similar way.ercentage markups are used in retail, government and business environments to calculate the percent of a value that will be added to that value. Excel allows you to calculate percent markup values and then add them to your data.
1. Source: www.flickr.com. Amazon is the largest river in the world, the discharge of the river is greater than the next 7 largest rivers mixed except Madeira and Rio Negro are the tributaries of the Amazon.
Best Answer: The Nile River is the longest river in the world, stretching for 4,187 miles. The Nile flows from south to north and is formed by three major tributaries: the White Nile, the Blue Nile and the Atbara. The Blue Nile has its source in the highlands of the African country of Ethiopia, by Lake Tana.