-82.46% is the change from 439 to 77
Calculation steps:
[( 77 - 439 ) ÷ 439] x 100 = -82.46%
Formula
Percentage change = [(77 - 439) / 439] x 100
Subtract the new number by the original number
77 - 439 = -362
-362 ÷ 439 = -0.8246013667425968
-0.8246013667425968 x 100 = -82.46%