-54.5% is the change from 866 to 394
Calculation steps:
[( 394 - 866 ) ÷ 866] x 100 = -54.5%
Formula
Percentage change = [(394 - 866) / 866] x 100
Subtract the new number by the original number
394 - 866 = -472
-472 ÷ 866 = -0.5450346420323325
-0.5450346420323325 x 100 = -54.5%