-80.58% is the change from 417 to 81
Calculation steps:
[( 81 - 417 ) ÷ 417] x 100 = -80.58%
Formula
Percentage change = [(81 - 417) / 417] x 100
Subtract the new number by the original number
81 - 417 = -336
-336 ÷ 417 = -0.8057553956834532
-0.8057553956834532 x 100 = -80.58%