-83.78% is the change from 629 to 102
Calculation steps:
[( 102 - 629 ) ÷ 629] x 100 = -83.78%
Formula
Percentage change = [(102 - 629) / 629] x 100
Subtract the new number by the original number
102 - 629 = -527
-527 ÷ 629 = -0.8378378378378378
-0.8378378378378378 x 100 = -83.78%