1042.5% is the change from 40 to 457
Calculation steps:
[( 457 - 40 ) ÷ 40] x 100 = 1042.5%
Formula
Percentage change = [(457 - 40) / 40] x 100
Subtract the new number by the original number
457 - 40 = 417
417 ÷ 40 = 10.425
10.425 x 100 = 1042.5%
Example