-98.57% is the change from 837 to 12
Calculation steps:
[( 12 - 837 ) ÷ 837] x 100 = -98.57%
Formula
Percentage change = [(12 - 837) / 837] x 100
Subtract the new number by the original number
12 - 837 = -825
-825 ÷ 837 = -0.985663082437276
-0.985663082437276 x 100 = -98.57%