-71.59% is the change from 866 to 246
Calculation steps:
[( 246 - 866 ) ÷ 866] x 100 = -71.59%
Formula
Percentage change = [(246 - 866) / 866] x 100
Subtract the new number by the original number
246 - 866 = -620
-620 ÷ 866 = -0.7159353348729792
-0.7159353348729792 x 100 = -71.59%