-75.76% is the change from 850 to 206
Calculation steps:
[( 206 - 850 ) ÷ 850] x 100 = -75.76%
Formula
Percentage change = [(206 - 850) / 850] x 100
Subtract the new number by the original number
206 - 850 = -644
-644 ÷ 850 = -0.7576470588235295
-0.7576470588235295 x 100 = -75.76%