У вашего броузера проблема в совместимости с HTML5
FREE Excel Formulas for Beginners Class - http://skl.sh/2bCJHFK
Calculate the percentage increase of a number in Excel. Write a formula in Excel to calculate 10 percent increase on a number. This can be done either within the formula, or using a percentage entered into a cell.
Find more great free tutorials at;
http://www.computergaga.com
Connect with us!
Google+ ► https://plus.google.com/+Computergaga
Facebook ► http://www.facebook.com/computergaga
Twitter ► http://www.twitter.com/computergaga1