1322.22% is the change from 18 to 256
Calculation steps:
[( 256 - 18 ) ÷ 18] x 100 = 1322.22%
Formula
Percentage change = [(256 - 18) / 18] x 100
Subtract the new number by the original number
256 - 18 = 238
238 ÷ 18 = 13.222222222222221
13.222222222222221 x 100 = 1322.22%