-4.2% is the change from 904 to 866
Calculation steps:
[( 866 - 904 ) ÷ 904] x 100 = -4.2%
Formula
Percentage change = [(866 - 904) / 904] x 100
Subtract the new number by the original number
866 - 904 = -38
-38 ÷ 904 = -0.0420353982300885
-0.0420353982300885 x 100 = -4.2%