-16.99% is the change from 971 to 806
Calculation steps:
[( 806 - 971 ) ÷ 971] x 100 = -16.99%
Formula
Percentage change = [(806 - 971) / 971] x 100
Subtract the new number by the original number
806 - 971 = -165
-165 ÷ 971 = -0.16992790937178168
-0.16992790937178168 x 100 = -16.99%