-82.89% is the change from 485 to 83
Calculation steps:
[( 83 - 485 ) ÷ 485] x 100 = -82.89%
Formula
Percentage change = [(83 - 485) / 485] x 100
Subtract the new number by the original number
83 - 485 = -402
-402 ÷ 485 = -0.8288659793814434
-0.8288659793814434 x 100 = -82.89%