-77.95% is the change from 857 to 189
Calculation steps:
[( 189 - 857 ) ÷ 857] x 100 = -77.95%
Formula
Percentage change = [(189 - 857) / 857] x 100
Subtract the new number by the original number
189 - 857 = -668
-668 ÷ 857 = -0.779463243873979
-0.779463243873979 x 100 = -77.95%