-99.61% is the change from 508 to 2
Calculation steps:
[( 2 - 508 ) ÷ 508] x 100 = -99.61%
Formula
Percentage change = [(2 - 508) / 508] x 100
Subtract the new number by the original number
2 - 508 = -506
-506 ÷ 508 = -0.9960629921259843
-0.9960629921259843 x 100 = -99.61%