-88.37% is the change from 258 to 30
Calculation steps:
[( 30 - 258 ) ÷ 258] x 100 = -88.37%
Formula
Percentage change = [(30 - 258) / 258] x 100
Subtract the new number by the original number
30 - 258 = -228
-228 ÷ 258 = -0.8837209302325582
-0.8837209302325582 x 100 = -88.37%