7.5% is the change from 40 to 43
Calculation steps:
[( 43 - 40 ) ÷ 40] x 100 = 7.5%
Formula
Percentage change = [(43 - 40) / 40] x 100
Subtract the new number by the original number
43 - 40 = 3
3 ÷ 40 = 0.075
0.075 x 100 = 7.5%
Example