-51.85% is the change from 324 to 156
Calculation steps:
[( 156 - 324 ) ÷ 324] x 100 = -51.85%
Formula
Percentage change = [(156 - 324) / 324] x 100
Subtract the new number by the original number
156 - 324 = -168
-168 ÷ 324 = -0.5185185185185185
-0.5185185185185185 x 100 = -51.85%