-76.4% is the change from 839 to 198
Calculation steps:
[( 198 - 839 ) ÷ 839] x 100 = -76.4%
Formula
Percentage change = [(198 - 839) / 839] x 100
Subtract the new number by the original number
198 - 839 = -641
-641 ÷ 839 = -0.7640047675804529
-0.7640047675804529 x 100 = -76.4%