-17.61% is the change from 971 to 800
Calculation steps:
[( 800 - 971 ) ÷ 971] x 100 = -17.61%
Formula
Percentage change = [(800 - 971) / 971] x 100
Subtract the new number by the original number
800 - 971 = -171
-171 ÷ 971 = -0.17610710607621008
-0.17610710607621008 x 100 = -17.61%