-17.71% is the change from 971 to 799
Calculation steps:
[( 799 - 971 ) ÷ 971] x 100 = -17.71%
Formula
Percentage change = [(799 - 971) / 971] x 100
Subtract the new number by the original number
799 - 971 = -172
-172 ÷ 971 = -0.17713697219361482
-0.17713697219361482 x 100 = -17.71%