-76.82% is the change from 850 to 197
Calculation steps:
[( 197 - 850 ) ÷ 850] x 100 = -76.82%
Formula
Percentage change = [(197 - 850) / 850] x 100
Subtract the new number by the original number
197 - 850 = -653
-653 ÷ 850 = -0.768235294117647
-0.768235294117647 x 100 = -76.82%