-25.93% is the change from 54 to 40
Calculation steps:
[( 40 - 54 ) ÷ 54] x 100 = -25.93%
Formula
Percentage change = [(40 - 54) / 54] x 100
Subtract the new number by the original number
40 - 54 = -14
-14 ÷ 54 = -0.25925925925925924
-0.25925925925925924 x 100 = -25.93%
Example