-86.28% is the change from 605 to 83
Calculation steps:
[( 83 - 605 ) ÷ 605] x 100 = -86.28%
Formula
Percentage change = [(83 - 605) / 605] x 100
Subtract the new number by the original number
83 - 605 = -522
-522 ÷ 605 = -0.8628099173553719
-0.8628099173553719 x 100 = -86.28%