-88.38% is the change from 439 to 51
Calculation steps:
[( 51 - 439 ) ÷ 439] x 100 = -88.38%
Formula
Percentage change = [(51 - 439) / 439] x 100
Subtract the new number by the original number
51 - 439 = -388
-388 ÷ 439 = -0.8838268792710706
-0.8838268792710706 x 100 = -88.38%