-80.67% is the change from 419 to 81
Calculation steps:
[( 81 - 419 ) ÷ 419] x 100 = -80.67%
Formula
Percentage change = [(81 - 419) / 419] x 100
Subtract the new number by the original number
81 - 419 = -338
-338 ÷ 419 = -0.8066825775656324
-0.8066825775656324 x 100 = -80.67%