-89.28% is the change from 830 to 89
Calculation steps:
[( 89 - 830 ) ÷ 830] x 100 = -89.28%
Formula
Percentage change = [(89 - 830) / 830] x 100
Subtract the new number by the original number
89 - 830 = -741
-741 ÷ 830 = -0.8927710843373494
-0.8927710843373494 x 100 = -89.28%