-77.25% is the change from 866 to 197
Calculation steps:
[( 197 - 866 ) ÷ 866] x 100 = -77.25%
Formula
Percentage change = [(197 - 866) / 866] x 100
Subtract the new number by the original number
197 - 866 = -669
-669 ÷ 866 = -0.7725173210161663
-0.7725173210161663 x 100 = -77.25%