1557.5% is the change from 40 to 663
Calculation steps:
[( 663 - 40 ) ÷ 40] x 100 = 1557.5%
Formula
Percentage change = [(663 - 40) / 40] x 100
Subtract the new number by the original number
663 - 40 = 623
623 ÷ 40 = 15.575
15.575 x 100 = 1557.5%
Example