1127.5% is the change from 40 to 491
Calculation steps:
[( 491 - 40 ) ÷ 40] x 100 = 1127.5%
Formula
Percentage change = [(491 - 40) / 40] x 100
Subtract the new number by the original number
491 - 40 = 451
451 ÷ 40 = 11.275
11.275 x 100 = 1127.5%
Example