-98.56% is the change from 833 to 12
Calculation steps:
[( 12 - 833 ) ÷ 833] x 100 = -98.56%
Formula
Percentage change = [(12 - 833) / 833] x 100
Subtract the new number by the original number
12 - 833 = -821
-821 ÷ 833 = -0.985594237695078
-0.985594237695078 x 100 = -98.56%