-94.43% is the change from 539 to 30
Calculation steps:
[( 30 - 539 ) ÷ 539] x 100 = -94.43%
Formula
Percentage change = [(30 - 539) / 539] x 100
Subtract the new number by the original number
30 - 539 = -509
-509 ÷ 539 = -0.9443413729128015
-0.9443413729128015 x 100 = -94.43%