-99.35% is the change from 310 to 2
Calculation steps:
[( 2 - 310 ) ÷ 310] x 100 = -99.35%
Formula
Percentage change = [(2 - 310) / 310] x 100
Subtract the new number by the original number
2 - 310 = -308
-308 ÷ 310 = -0.9935483870967742
-0.9935483870967742 x 100 = -99.35%