-93.02% is the change from 258 to 18
Calculation steps:
[( 18 - 258 ) ÷ 258] x 100 = -93.02%
Formula
Percentage change = [(18 - 258) / 258] x 100
Subtract the new number by the original number
18 - 258 = -240
-240 ÷ 258 = -0.9302325581395349
-0.9302325581395349 x 100 = -93.02%