-39.78% is the change from 548 to 330
Calculation steps:
[( 330 - 548 ) ÷ 548] x 100 = -39.78%
Formula
Percentage change = [(330 - 548) / 548] x 100
Subtract the new number by the original number
330 - 548 = -218
-218 ÷ 548 = -0.3978102189781022
-0.3978102189781022 x 100 = -39.78%