-22.44% is the change from 851 to 660
Calculation steps:
[( 660 - 851 ) ÷ 851] x 100 = -22.44%
Formula
Percentage change = [(660 - 851) / 851] x 100
Subtract the new number by the original number
660 - 851 = -191
-191 ÷ 851 = -0.2244418331374853
-0.2244418331374853 x 100 = -22.44%