-39.89% is the change from 549 to 330
Calculation steps:
[( 330 - 549 ) ÷ 549] x 100 = -39.89%
Formula
Percentage change = [(330 - 549) / 549] x 100
Subtract the new number by the original number
330 - 549 = -219
-219 ÷ 549 = -0.3989071038251366
-0.3989071038251366 x 100 = -39.89%