-28.57% is the change from 56 to 40
Calculation steps:
[( 40 - 56 ) ÷ 56] x 100 = -28.57%
Formula
Percentage change = [(40 - 56) / 56] x 100
Subtract the new number by the original number
40 - 56 = -16
-16 ÷ 56 = -0.2857142857142857
-0.2857142857142857 x 100 = -28.57%