# Modify through Percentage Increase or Decrease Percentages help compare various sums. A fractional number expressed as a percentage of 100 is called a “portion.” When anything is described as “100% of something,” it is assumed to be the whole thing. Instead of quoting the exact dollar amounts, you may more quickly compare the two by referring to the associated percentage changes. The best way to determine a % number is with the help of a percentage calculator.

A Percentage-Based Raise

The first step in evaluating the rate of expansion of a number over time is to calculate the gap between the two positions. The percentage growth from the initial value may be determined using this difference.

A Decrease in the Percentage

The first step in determining the rate of fall of a quantity over time is to determine the gap between the beginning and end points. We then use the % difference between the two figures to express how much the new value is less than the previous one.

Changes in Percentage and Some Examples

• Here’s an initial example:

Suresh’s salary increased from INR 18,000,000 to INR 22,000,000. Work out the annual percentage rate of expansion.

Therefore, Rs. 18,000 is the correct answer (the original salary)

Gain from Rs. 18,000 to Rs. 22,00,000

This translates to a 4,000 rupee (or \$600) increase in annual salary (Rs 22,00,000 minus Rs 18,00,000).

Percentage raise in pay = (new salary / previous salary) x 100

= (4,00,000/18,00,000) x 100 = 22.22%

Here’s another case in point:

Due to the pandemic, the town’s population plummeted from 18,560 to 15,787. How much of a population decline is that relative to what year exactly?

At the time of the first count, there were 18,560 people in the area.

Drop in population = 15,787

18 minus 15 minus 783 Equals a -2,773 drop in population.

To express a population decline as a percentage, we multiply the result of (Decline in Population / Initial Population) by 100.

= (2773/18560) x 100 = 14.94%