-50.62% is the change from 322 to 159
Calculation steps:
[( 159 - 322 ) ÷ 322] x 100 = -50.62%
Formula
Percentage change = [(159 - 322) / 322] x 100
Subtract the new number by the original number
159 - 322 = -163
-163 ÷ 322 = -0.5062111801242236
-0.5062111801242236 x 100 = -50.62%