1210% is the change from 40 to 524
Calculation steps:
[( 524 - 40 ) ÷ 40] x 100 = 1210%
Formula
Percentage change = [(524 - 40) / 40] x 100
Subtract the new number by the original number
524 - 40 = 484
484 ÷ 40 = 12.1
12.1 x 100 = 1210%
Example