-6.88% is the change from 930 to 866
Calculation steps:
[( 866 - 930 ) ÷ 930] x 100 = -6.88%
Formula
Percentage change = [(866 - 930) / 930] x 100
Subtract the new number by the original number
866 - 930 = -64
-64 ÷ 930 = -0.06881720430107527
-0.06881720430107527 x 100 = -6.88%