-21.11% is the change from 971 to 766
Calculation steps:
[( 766 - 971 ) ÷ 971] x 100 = -21.11%
Formula
Percentage change = [(766 - 971) / 971] x 100
Subtract the new number by the original number
766 - 971 = -205
-205 ÷ 971 = -0.21112255406797117
-0.21112255406797117 x 100 = -21.11%