-85.2% is the change from 561 to 83
Calculation steps:
[( 83 - 561 ) ÷ 561] x 100 = -85.2%
Formula
Percentage change = [(83 - 561) / 561] x 100
Subtract the new number by the original number
83 - 561 = -478
-478 ÷ 561 = -0.8520499108734403
-0.8520499108734403 x 100 = -85.2%