-82.24% is the change from 850 to 151
Calculation steps:
[( 151 - 850 ) ÷ 850] x 100 = -82.24%
Formula
Percentage change = [(151 - 850) / 850] x 100
Subtract the new number by the original number
151 - 850 = -699
-699 ÷ 850 = -0.8223529411764706
-0.8223529411764706 x 100 = -82.24%