-66.11% is the change from 239 to 81
Calculation steps:
[( 81 - 239 ) ÷ 239] x 100 = -66.11%
Formula
Percentage change = [(81 - 239) / 239] x 100
Subtract the new number by the original number
81 - 239 = -158
-158 ÷ 239 = -0.6610878661087866
-0.6610878661087866 x 100 = -66.11%