1037.5% is the change from 40 to 455
Calculation steps:
[( 455 - 40 ) ÷ 40] x 100 = 1037.5%
Formula
Percentage change = [(455 - 40) / 40] x 100
Subtract the new number by the original number
455 - 40 = 415
415 ÷ 40 = 10.375
10.375 x 100 = 1037.5%
Example