1450% is the change from 18 to 279
Calculation steps:
[( 279 - 18 ) ÷ 18] x 100 = 1450%
Formula
Percentage change = [(279 - 18) / 18] x 100
Subtract the new number by the original number
279 - 18 = 261
261 ÷ 18 = 14.5
14.5 x 100 = 1450%
Example