-86.21% is the change from 602 to 83
Calculation steps:
[( 83 - 602 ) ÷ 602] x 100 = -86.21%
Formula
Percentage change = [(83 - 602) / 602] x 100
Subtract the new number by the original number
83 - 602 = -519
-519 ÷ 602 = -0.8621262458471761
-0.8621262458471761 x 100 = -86.21%