1342.5% is the change from 40 to 577
Calculation steps:
[( 577 - 40 ) ÷ 40] x 100 = 1342.5%
Formula
Percentage change = [(577 - 40) / 40] x 100
Subtract the new number by the original number
577 - 40 = 537
537 ÷ 40 = 13.425
13.425 x 100 = 1342.5%
Example