-82.17% is the change from 931 to 166
Calculation steps:
[( 166 - 931 ) ÷ 931] x 100 = -82.17%
Formula
Percentage change = [(166 - 931) / 931] x 100
Subtract the new number by the original number
166 - 931 = -765
-765 ÷ 931 = -0.8216970998925887
-0.8216970998925887 x 100 = -82.17%