-77.91% is the change from 851 to 188
Calculation steps:
[( 188 - 851 ) ÷ 851] x 100 = -77.91%
Formula
Percentage change = [(188 - 851) / 851] x 100
Subtract the new number by the original number
188 - 851 = -663
-663 ÷ 851 = -0.7790834312573442
-0.7790834312573442 x 100 = -77.91%