-61.05% is the change from 439 to 171
Calculation steps:
[( 171 - 439 ) ÷ 439] x 100 = -61.05%
Formula
Percentage change = [(171 - 439) / 439] x 100
Subtract the new number by the original number
171 - 439 = -268
-268 ÷ 439 = -0.6104783599088838
-0.6104783599088838 x 100 = -61.05%