3275% is the change from 12 to 405
Calculation steps:
[( 405 - 12 ) ÷ 12] x 100 = 3275%
Formula
Percentage change = [(405 - 12) / 12] x 100
Subtract the new number by the original number
405 - 12 = 393
393 ÷ 12 = 32.75
32.75 x 100 = 3275%
Example