-76.67% is the change from 866 to 202
Calculation steps:
[( 202 - 866 ) ÷ 866] x 100 = -76.67%
Formula
Percentage change = [(202 - 866) / 866] x 100
Subtract the new number by the original number
202 - 866 = -664
-664 ÷ 866 = -0.766743648960739
-0.766743648960739 x 100 = -76.67%