-77.88% is the change from 850 to 188
Calculation steps:
[( 188 - 850 ) ÷ 850] x 100 = -77.88%
Formula
Percentage change = [(188 - 850) / 850] x 100
Subtract the new number by the original number
188 - 850 = -662
-662 ÷ 850 = -0.7788235294117647
-0.7788235294117647 x 100 = -77.88%