3700% is the change from 12 to 456
Calculation steps:
[( 456 - 12 ) ÷ 12] x 100 = 3700%
Formula
Percentage change = [(456 - 12) / 12] x 100
Subtract the new number by the original number
456 - 12 = 444
444 ÷ 12 = 37
37 x 100 = 3700%
Example