-18.72% is the change from 406 to 330
Calculation steps:
[( 330 - 406 ) ÷ 406] x 100 = -18.72%
Formula
Percentage change = [(330 - 406) / 406] x 100
Subtract the new number by the original number
330 - 406 = -76
-76 ÷ 406 = -0.18719211822660098
-0.18719211822660098 x 100 = -18.72%