4091.67% is the change from 12 to 503
Calculation steps:
[( 503 - 12 ) ÷ 12] x 100 = 4091.67%
Formula
Percentage change = [(503 - 12) / 12] x 100
Subtract the new number by the original number
503 - 12 = 491
491 ÷ 12 = 40.916666666666664
40.916666666666664 x 100 = 4091.67%