1390% is the change from 40 to 596
Calculation steps:
[( 596 - 40 ) ÷ 40] x 100 = 1390%
Formula
Percentage change = [(596 - 40) / 40] x 100
Subtract the new number by the original number
596 - 40 = 556
556 ÷ 40 = 13.9
13.9 x 100 = 1390%
Example