-72.16% is the change from 291 to 81
Calculation steps:
[( 81 - 291 ) ÷ 291] x 100 = -72.16%
Formula
Percentage change = [(81 - 291) / 291] x 100
Subtract the new number by the original number
81 - 291 = -210
-210 ÷ 291 = -0.7216494845360825
-0.7216494845360825 x 100 = -72.16%