-63.45% is the change from 539 to 197
Calculation steps:
[( 197 - 539 ) ÷ 539] x 100 = -63.45%
Formula
Percentage change = [(197 - 539) / 539] x 100
Subtract the new number by the original number
197 - 539 = -342
-342 ÷ 539 = -0.634508348794063
-0.634508348794063 x 100 = -63.45%