-91.65% is the change from 539 to 45
Calculation steps:
[( 45 - 539 ) ÷ 539] x 100 = -91.65%
Formula
Percentage change = [(45 - 539) / 539] x 100
Subtract the new number by the original number
45 - 539 = -494
-494 ÷ 539 = -0.9165120593692022
-0.9165120593692022 x 100 = -91.65%