-96.97% is the change from 330 to 10
Calculation steps:
[( 10 - 330 ) ÷ 330] x 100 = -96.97%
Formula
Percentage change = [(10 - 330) / 330] x 100
Subtract the new number by the original number
10 - 330 = -320
-320 ÷ 330 = -0.9696969696969697
-0.9696969696969697 x 100 = -96.97%