2858.33% is the change from 12 to 355
Calculation steps:
[( 355 - 12 ) ÷ 12] x 100 = 2858.33%
Formula
Percentage change = [(355 - 12) / 12] x 100
Subtract the new number by the original number
355 - 12 = 343
343 ÷ 12 = 28.583333333333332
28.583333333333332 x 100 = 2858.33%