-99.01% is the change from 606 to 6
Calculation steps:
[( 6 - 606 ) ÷ 606] x 100 = -99.01%
Formula
Percentage change = [(6 - 606) / 606] x 100
Subtract the new number by the original number
6 - 606 = -600
-600 ÷ 606 = -0.9900990099009901
-0.9900990099009901 x 100 = -99.01%