-99% is the change from 601 to 6
Calculation steps:
[( 6 - 601 ) ÷ 601] x 100 = -99%
Formula
Percentage change = [(6 - 601) / 601] x 100
Subtract the new number by the original number
6 - 601 = -595
-595 ÷ 601 = -0.9900166389351082
-0.9900166389351082 x 100 = -99%