-83.16% is the change from 766 to 129
Calculation steps:
[( 129 - 766 ) ÷ 766] x 100 = -83.16%
Formula
Percentage change = [(129 - 766) / 766] x 100
Subtract the new number by the original number
129 - 766 = -637
-637 ÷ 766 = -0.8315926892950392
-0.8315926892950392 x 100 = -83.16%