40% is the change from 40 to 56
Calculation steps:
[( 56 - 40 ) ÷ 40] x 100 = 40%
Formula
Percentage change = [(56 - 40) / 40] x 100
Subtract the new number by the original number
56 - 40 = 16
16 ÷ 40 = 0.4
0.4 x 100 = 40%
Example