-86.3% is the change from 606 to 83
Calculation steps:
[( 83 - 606 ) ÷ 606] x 100 = -86.3%
Formula
Percentage change = [(83 - 606) / 606] x 100
Subtract the new number by the original number
83 - 606 = -523
-523 ÷ 606 = -0.863036303630363
-0.863036303630363 x 100 = -86.3%