3975% is the change from 12 to 489
Calculation steps:
[( 489 - 12 ) ÷ 12] x 100 = 3975%
Formula
Percentage change = [(489 - 12) / 12] x 100
Subtract the new number by the original number
489 - 12 = 477
477 ÷ 12 = 39.75
39.75 x 100 = 3975%
Example