-6.98% is the change from 931 to 866
Calculation steps:
[( 866 - 931 ) ÷ 931] x 100 = -6.98%
Formula
Percentage change = [(866 - 931) / 931] x 100
Subtract the new number by the original number
866 - 931 = -65
-65 ÷ 931 = -0.06981740064446831
-0.06981740064446831 x 100 = -6.98%