-89.73% is the change from 331 to 34
Calculation steps:
[( 34 - 331 ) ÷ 331] x 100 = -89.73%
Formula
Percentage change = [(34 - 331) / 331] x 100
Subtract the new number by the original number
34 - 331 = -297
-297 ÷ 331 = -0.8972809667673716
-0.8972809667673716 x 100 = -89.73%