-87.02% is the change from 439 to 57
Calculation steps:
[( 57 - 439 ) ÷ 439] x 100 = -87.02%
Formula
Percentage change = [(57 - 439) / 439] x 100
Subtract the new number by the original number
57 - 439 = -382
-382 ÷ 439 = -0.8701594533029613
-0.8701594533029613 x 100 = -87.02%