-69.63% is the change from 866 to 263
Calculation steps:
[( 263 - 866 ) ÷ 866] x 100 = -69.63%
Formula
Percentage change = [(263 - 866) / 866] x 100
Subtract the new number by the original number
263 - 866 = -603
-603 ÷ 866 = -0.6963048498845266
-0.6963048498845266 x 100 = -69.63%