1288.89% is the change from 18 to 250
Calculation steps:
[( 250 - 18 ) ÷ 18] x 100 = 1288.89%
Formula
Percentage change = [(250 - 18) / 18] x 100
Subtract the new number by the original number
250 - 18 = 232
232 ÷ 18 = 12.88888888888889
12.88888888888889 x 100 = 1288.89%