1027.5% is the change from 40 to 451
Calculation steps:
[( 451 - 40 ) ÷ 40] x 100 = 1027.5%
Formula
Percentage change = [(451 - 40) / 40] x 100
Subtract the new number by the original number
451 - 40 = 411
411 ÷ 40 = 10.275
10.275 x 100 = 1027.5%
Example