A percent of decrease (percentage decrease) is when a value is reduced by a percentage of its original amount. e.g. 100 decreased by 15 percent is 85. A percent of increase (percentage increase) is...
first calculate the value of increase e.g. if 100 increases to 110 then the increase is 10.Then you calculate the percentage increase by diving the increase by the original number then multiply by...
work out the difference between the new value and the original value. divide this value by the original value multiply this value by 100 to give you the percentage