1300% is the change from 40 to 560
Calculation steps:
[( 560 - 40 ) ÷ 40] x 100 = 1300%
Formula
Percentage change = [(560 - 40) / 40] x 100
Subtract the new number by the original number
560 - 40 = 520
520 ÷ 40 = 13
13 x 100 = 1300%
Example