1283.33% is the change from 18 to 249
Calculation steps:
[( 249 - 18 ) ÷ 18] x 100 = 1283.33%
Formula
Percentage change = [(249 - 18) / 18] x 100
Subtract the new number by the original number
249 - 18 = 231
231 ÷ 18 = 12.833333333333334
12.833333333333334 x 100 = 1283.33%