-97.11% is the change from 311 to 9
Calculation steps:
[( 9 - 311 ) ÷ 311] x 100 = -97.11%
Formula
Percentage change = [(9 - 311) / 311] x 100
Subtract the new number by the original number
9 - 311 = -302
-302 ÷ 311 = -0.9710610932475884
-0.9710610932475884 x 100 = -97.11%