-50.93% is the change from 322 to 158
Calculation steps:
[( 158 - 322 ) ÷ 322] x 100 = -50.93%
Formula
Percentage change = [(158 - 322) / 322] x 100
Subtract the new number by the original number
158 - 322 = -164
-164 ÷ 322 = -0.5093167701863354
-0.5093167701863354 x 100 = -50.93%