-18.52% is the change from 405 to 330
Calculation steps:
[( 330 - 405 ) ÷ 405] x 100 = -18.52%
Formula
Percentage change = [(330 - 405) / 405] x 100
Subtract the new number by the original number
330 - 405 = -75
-75 ÷ 405 = -0.18518518518518517
-0.18518518518518517 x 100 = -18.52%