-96.47% is the change from 539 to 19
Calculation steps:
[( 19 - 539 ) ÷ 539] x 100 = -96.47%
Formula
Percentage change = [(19 - 539) / 539] x 100
Subtract the new number by the original number
19 - 539 = -520
-520 ÷ 539 = -0.9647495361781077
-0.9647495361781077 x 100 = -96.47%