-76.1% is the change from 866 to 207
Calculation steps:
[( 207 - 866 ) ÷ 866] x 100 = -76.1%
Formula
Percentage change = [(207 - 866) / 866] x 100
Subtract the new number by the original number
207 - 866 = -659
-659 ÷ 866 = -0.7609699769053118
-0.7609699769053118 x 100 = -76.1%