-2.42% is the change from 331 to 323
Calculation steps:
[( 323 - 331 ) ÷ 331] x 100 = -2.42%
Formula
Percentage change = [(323 - 331) / 331] x 100
Subtract the new number by the original number
323 - 331 = -8
-8 ÷ 331 = -0.02416918429003021
-0.02416918429003021 x 100 = -2.42%