-96.51% is the change from 830 to 29
Calculation steps:
[( 29 - 830 ) ÷ 830] x 100 = -96.51%
Formula
Percentage change = [(29 - 830) / 830] x 100
Subtract the new number by the original number
29 - 830 = -801
-801 ÷ 830 = -0.9650602409638555
-0.9650602409638555 x 100 = -96.51%