-71.88% is the change from 288 to 81
Calculation steps:
[( 81 - 288 ) ÷ 288] x 100 = -71.88%
Formula
Percentage change = [(81 - 288) / 288] x 100
Subtract the new number by the original number
81 - 288 = -207
-207 ÷ 288 = -0.71875
-0.71875 x 100 = -71.88%