-89.7% is the change from 330 to 34
Calculation steps:
[( 34 - 330 ) ÷ 330] x 100 = -89.7%
Formula
Percentage change = [(34 - 330) / 330] x 100
Subtract the new number by the original number
34 - 330 = -296
-296 ÷ 330 = -0.896969696969697
-0.896969696969697 x 100 = -89.7%