-80.42% is the change from 424 to 83
Calculation steps:
[( 83 - 424 ) ÷ 424] x 100 = -80.42%
Formula
Percentage change = [(83 - 424) / 424] x 100
Subtract the new number by the original number
83 - 424 = -341
-341 ÷ 424 = -0.8042452830188679
-0.8042452830188679 x 100 = -80.42%