-97.42% is the change from 310 to 8
Calculation steps:
[( 8 - 310 ) ÷ 310] x 100 = -97.42%
Formula
Percentage change = [(8 - 310) / 310] x 100
Subtract the new number by the original number
8 - 310 = -302
-302 ÷ 310 = -0.9741935483870968
-0.9741935483870968 x 100 = -97.42%