3475% is the change from 12 to 429
Calculation steps:
[( 429 - 12 ) ÷ 12] x 100 = 3475%
Formula
Percentage change = [(429 - 12) / 12] x 100
Subtract the new number by the original number
429 - 12 = 417
417 ÷ 12 = 34.75
34.75 x 100 = 3475%
Example