-98.92% is the change from 837 to 9
Calculation steps:
[( 9 - 837 ) ÷ 837] x 100 = -98.92%
Formula
Percentage change = [(9 - 837) / 837] x 100
Subtract the new number by the original number
9 - 837 = -828
-828 ÷ 837 = -0.989247311827957
-0.989247311827957 x 100 = -98.92%