-9.37% is the change from 331 to 300
Calculation steps:
[( 300 - 331 ) ÷ 331] x 100 = -9.37%
Formula
Percentage change = [(300 - 331) / 331] x 100
Subtract the new number by the original number
300 - 331 = -31
-31 ÷ 331 = -0.09365558912386707
-0.09365558912386707 x 100 = -9.37%