1788.89% is the change from 18 to 340
Calculation steps:
[( 340 - 18 ) ÷ 18] x 100 = 1788.89%
Formula
Percentage change = [(340 - 18) / 18] x 100
Subtract the new number by the original number
340 - 18 = 322
322 ÷ 18 = 17.88888888888889
17.88888888888889 x 100 = 1788.89%