-51.55% is the change from 322 to 156
Calculation steps:
[( 156 - 322 ) ÷ 322] x 100 = -51.55%
Formula
Percentage change = [(156 - 322) / 322] x 100
Subtract the new number by the original number
156 - 322 = -166
-166 ÷ 322 = -0.515527950310559
-0.515527950310559 x 100 = -51.55%