-9.3% is the change from 258 to 234
Calculation steps:
[( 234 - 258 ) ÷ 258] x 100 = -9.3%
Formula
Percentage change = [(234 - 258) / 258] x 100
Subtract the new number by the original number
234 - 258 = -24
-24 ÷ 258 = -0.09302325581395349
-0.09302325581395349 x 100 = -9.3%