-10.07% is the change from 963 to 866
Calculation steps:
[( 866 - 963 ) ÷ 963] x 100 = -10.07%
Formula
Percentage change = [(866 - 963) / 963] x 100
Subtract the new number by the original number
866 - 963 = -97
-97 ÷ 963 = -0.10072689511941849
-0.10072689511941849 x 100 = -10.07%