-70.67% is the change from 866 to 254
Calculation steps:
[( 254 - 866 ) ÷ 866] x 100 = -70.67%
Formula
Percentage change = [(254 - 866) / 866] x 100
Subtract the new number by the original number
254 - 866 = -612
-612 ÷ 866 = -0.7066974595842956
-0.7066974595842956 x 100 = -70.67%