1388.89% is the change from 18 to 268
Calculation steps:
[( 268 - 18 ) ÷ 18] x 100 = 1388.89%
Formula
Percentage change = [(268 - 18) / 18] x 100
Subtract the new number by the original number
268 - 18 = 250
250 ÷ 18 = 13.88888888888889
13.88888888888889 x 100 = 1388.89%