-21.34% is the change from 806 to 634
Calculation steps:
[( 634 - 806 ) ÷ 806] x 100 = -21.34%
Formula
Percentage change = [(634 - 806) / 806] x 100
Subtract the new number by the original number
634 - 806 = -172
-172 ÷ 806 = -0.21339950372208435
-0.21339950372208435 x 100 = -21.34%