-71.13% is the change from 866 to 250
Calculation steps:
[( 250 - 866 ) ÷ 866] x 100 = -71.13%
Formula
Percentage change = [(250 - 866) / 866] x 100
Subtract the new number by the original number
250 - 866 = -616
-616 ÷ 866 = -0.7113163972286374
-0.7113163972286374 x 100 = -71.13%