-23.74% is the change from 851 to 649
Calculation steps:
[( 649 - 851 ) ÷ 851] x 100 = -23.74%
Formula
Percentage change = [(649 - 851) / 851] x 100
Subtract the new number by the original number
649 - 851 = -202
-202 ÷ 851 = -0.23736780258519388
-0.23736780258519388 x 100 = -23.74%