-7.75% is the change from 258 to 238
Calculation steps:
[( 238 - 258 ) ÷ 258] x 100 = -7.75%
Formula
Percentage change = [(238 - 258) / 258] x 100
Subtract the new number by the original number
238 - 258 = -20
-20 ÷ 258 = -0.07751937984496124
-0.07751937984496124 x 100 = -7.75%