3458.33% is the change from 12 to 427
Calculation steps:
[( 427 - 12 ) ÷ 12] x 100 = 3458.33%
Formula
Percentage change = [(427 - 12) / 12] x 100
Subtract the new number by the original number
427 - 12 = 415
415 ÷ 12 = 34.583333333333336
34.583333333333336 x 100 = 3458.33%