-76.9% is the change from 857 to 198
Calculation steps:
[( 198 - 857 ) ÷ 857] x 100 = -76.9%
Formula
Percentage change = [(198 - 857) / 857] x 100
Subtract the new number by the original number
198 - 857 = -659
-659 ÷ 857 = -0.7689614935822637
-0.7689614935822637 x 100 = -76.9%