-63.86% is the change from 866 to 313
Calculation steps:
[( 313 - 866 ) ÷ 866] x 100 = -63.86%
Formula
Percentage change = [(313 - 866) / 866] x 100
Subtract the new number by the original number
313 - 866 = -553
-553 ÷ 866 = -0.6385681293302541
-0.6385681293302541 x 100 = -63.86%