-82% is the change from 539 to 97
Calculation steps:
[( 97 - 539 ) ÷ 539] x 100 = -82%
Formula
Percentage change = [(97 - 539) / 539] x 100
Subtract the new number by the original number
97 - 539 = -442
-442 ÷ 539 = -0.8200371057513914
-0.8200371057513914 x 100 = -82%