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.
World Map shows location of top ten longest rivers by length in Kilometers. While Nile River is the longest river on earth with length of 6,695 km. and number two is Amazon River with 6,516 km.