Finally multiply the number by 100 to turn your result into a percentage to get the year-over-year percentage change. Trend analysis is a percentage-based evaluation of how your company is performing from year to year. You basically have to think about what remains when we decrease a number by 10 - 90 remains.
To format the result as a percentage click the Percent Style button in the Number section on the Home tab.
Another interesting aspect of the percentage decrease calculator is that it displays the difference as well as the percent difference. If the percentage is negative it means the sales of the product have decreased. The world population went from 530000000. To calculate percentage increases and decreases we use Percentage multipliers.