-69.98% is the change from 866 to 260
Calculation steps:
[( 260 - 866 ) ÷ 866] x 100 = -69.98%
Formula
Percentage change = [(260 - 866) / 866] x 100
Subtract the new number by the original number
260 - 866 = -606
-606 ÷ 866 = -0.6997690531177829
-0.6997690531177829 x 100 = -69.98%