-30.96% is the change from 478 to 330
Calculation steps:
[( 330 - 478 ) ÷ 478] x 100 = -30.96%
Formula
Percentage change = [(330 - 478) / 478] x 100
Subtract the new number by the original number
330 - 478 = -148
-148 ÷ 478 = -0.30962343096234307
-0.30962343096234307 x 100 = -30.96%