-76.59% is the change from 850 to 199
Calculation steps:
[( 199 - 850 ) ÷ 850] x 100 = -76.59%
Formula
Percentage change = [(199 - 850) / 850] x 100
Subtract the new number by the original number
199 - 850 = -651
-651 ÷ 850 = -0.7658823529411765
-0.7658823529411765 x 100 = -76.59%