1805.56% is the change from 18 to 343
Calculation steps:
[( 343 - 18 ) ÷ 18] x 100 = 1805.56%
Formula
Percentage change = [(343 - 18) / 18] x 100
Subtract the new number by the original number
343 - 18 = 325
325 ÷ 18 = 18.055555555555557
18.055555555555557 x 100 = 1805.56%