How to calculate percentage of a number?
To calculate the percentage of a number, multiply the number by the percent and divide by 100.
For example, to calculate 15% of 200, multiply 15 by 200 and divide by 100, that makes 30 is %15 of 200.
percentage formula
result = percent * number / 100
How to calculate percentage increase or decrease?
To calculate the percentage increase or decrease of a number, find the difference between the two numbers, divide the difference by the initial number and multiply by 100.
For example, to calculate the percentage increase from 30 to 45, divide 15 by 30 and multiply by 100, that makes the percentage increase is 50%.
percentage increase/decrease formula
increase/decrease = (Value2 - Value1) / Value1 * 100