-90.08% is the change from 837 to 83
Calculation steps:
[( 83 - 837 ) ÷ 837] x 100 = -90.08%
Formula
Percentage change = [(83 - 837) / 837] x 100
Subtract the new number by the original number
83 - 837 = -754
-754 ÷ 837 = -0.9008363201911589
-0.9008363201911589 x 100 = -90.08%