1400% is the change from 18 to 270
Calculation steps:
[( 270 - 18 ) ÷ 18] x 100 = 1400%
Formula
Percentage change = [(270 - 18) / 18] x 100
Subtract the new number by the original number
270 - 18 = 252
252 ÷ 18 = 14
14 x 100 = 1400%
Example