-30.6% is the change from 866 to 601
Calculation steps:
[( 601 - 866 ) ÷ 866] x 100 = -30.6%
Formula
Percentage change = [(601 - 866) / 866] x 100
Subtract the new number by the original number
601 - 866 = -265
-265 ÷ 866 = -0.30600461893764436
-0.30600461893764436 x 100 = -30.6%