2900% is the change from 12 to 360
Calculation steps:
[( 360 - 12 ) ÷ 12] x 100 = 2900%
Formula
Percentage change = [(360 - 12) / 12] x 100
Subtract the new number by the original number
360 - 12 = 348
348 ÷ 12 = 29
29 x 100 = 2900%
Example