-90.44% is the change from 837 to 80
Calculation steps:
[( 80 - 837 ) ÷ 837] x 100 = -90.44%
Formula
Percentage change = [(80 - 837) / 837] x 100
Subtract the new number by the original number
80 - 837 = -757
-757 ÷ 837 = -0.9044205495818399
-0.9044205495818399 x 100 = -90.44%