-84.84% is the change from 508 to 77
Calculation steps:
[( 77 - 508 ) ÷ 508] x 100 = -84.84%
Formula
Percentage change = [(77 - 508) / 508] x 100
Subtract the new number by the original number
77 - 508 = -431
-431 ÷ 508 = -0.8484251968503937
-0.8484251968503937 x 100 = -84.84%