-12.35% is the change from 988 to 866
Calculation steps:
[( 866 - 988 ) ÷ 988] x 100 = -12.35%
Formula
Percentage change = [(866 - 988) / 988] x 100
Subtract the new number by the original number
866 - 988 = -122
-122 ÷ 988 = -0.12348178137651822
-0.12348178137651822 x 100 = -12.35%