-20.37% is the change from 324 to 258
Calculation steps:
[( 258 - 324 ) ÷ 324] x 100 = -20.37%
Formula
Percentage change = [(258 - 324) / 324] x 100
Subtract the new number by the original number
258 - 324 = -66
-66 ÷ 324 = -0.2037037037037037
-0.2037037037037037 x 100 = -20.37%