-71.68% is the change from 286 to 81
Calculation steps:
[( 81 - 286 ) ÷ 286] x 100 = -71.68%
Formula
Percentage change = [(81 - 286) / 286] x 100
Subtract the new number by the original number
81 - 286 = -205
-205 ÷ 286 = -0.7167832167832168
-0.7167832167832168 x 100 = -71.68%