-86.09% is the change from 539 to 75
Calculation steps:
[( 75 - 539 ) ÷ 539] x 100 = -86.09%
Formula
Percentage change = [(75 - 539) / 539] x 100
Subtract the new number by the original number
75 - 539 = -464
-464 ÷ 539 = -0.8608534322820037
-0.8608534322820037 x 100 = -86.09%