-50.46% is the change from 325 to 161
Calculation steps:
[( 161 - 325 ) ÷ 325] x 100 = -50.46%
Formula
Percentage change = [(161 - 325) / 325] x 100
Subtract the new number by the original number
161 - 325 = -164
-164 ÷ 325 = -0.5046153846153846
-0.5046153846153846 x 100 = -50.46%