-5.71% is the change from 350 to 330
Calculation steps:
[( 330 - 350 ) ÷ 350] x 100 = -5.71%
Formula
Percentage change = [(330 - 350) / 350] x 100
Subtract the new number by the original number
330 - 350 = -20
-20 ÷ 350 = -0.05714285714285714
-0.05714285714285714 x 100 = -5.71%