-80.1% is the change from 417 to 83
Calculation steps:
[( 83 - 417 ) ÷ 417] x 100 = -80.1%
Formula
Percentage change = [(83 - 417) / 417] x 100
Subtract the new number by the original number
83 - 417 = -334
-334 ÷ 417 = -0.8009592326139089
-0.8009592326139089 x 100 = -80.1%