-53.03% is the change from 330 to 155
Calculation steps:
[( 155 - 330 ) ÷ 330] x 100 = -53.03%
Formula
Percentage change = [(155 - 330) / 330] x 100
Subtract the new number by the original number
155 - 330 = -175
-175 ÷ 330 = -0.5303030303030303
-0.5303030303030303 x 100 = -53.03%