-80.76% is the change from 863 to 166
Calculation steps:
[( 166 - 863 ) ÷ 863] x 100 = -80.76%
Formula
Percentage change = [(166 - 863) / 863] x 100
Subtract the new number by the original number
166 - 863 = -697
-697 ÷ 863 = -0.8076477404403245
-0.8076477404403245 x 100 = -80.76%