-0.3% is the change from 331 to 330
Calculation steps:
[( 330 - 331 ) ÷ 331] x 100 = -0.3%
Formula
Percentage change = [(330 - 331) / 331] x 100
Subtract the new number by the original number
330 - 331 = -1
-1 ÷ 331 = -0.0030211480362537764
-0.0030211480362537764 x 100 = -0.3%