-80.24% is the change from 410 to 81
Calculation steps:
[( 81 - 410 ) ÷ 410] x 100 = -80.24%
Formula
Percentage change = [(81 - 410) / 410] x 100
Subtract the new number by the original number
81 - 410 = -329
-329 ÷ 410 = -0.802439024390244
-0.802439024390244 x 100 = -80.24%