-99.36% is the change from 311 to 2
Calculation steps:
[( 2 - 311 ) ÷ 311] x 100 = -99.36%
Formula
Percentage change = [(2 - 311) / 311] x 100
Subtract the new number by the original number
2 - 311 = -309
-309 ÷ 311 = -0.9935691318327974
-0.9935691318327974 x 100 = -99.36%