1292.5% is the change from 40 to 557
Calculation steps:
[( 557 - 40 ) ÷ 40] x 100 = 1292.5%
Formula
Percentage change = [(557 - 40) / 40] x 100
Subtract the new number by the original number
557 - 40 = 517
517 ÷ 40 = 12.925
12.925 x 100 = 1292.5%
Example