-20.16% is the change from 258 to 206
Calculation steps:
[( 206 - 258 ) ÷ 258] x 100 = -20.16%
Formula
Percentage change = [(206 - 258) / 258] x 100
Subtract the new number by the original number
206 - 258 = -52
-52 ÷ 258 = -0.20155038759689922
-0.20155038759689922 x 100 = -20.16%