-19.64% is the change from 56 to 45
Calculation steps:
[( 45 - 56 ) ÷ 56] x 100 = -19.64%
Formula
Percentage change = [(45 - 56) / 56] x 100
Subtract the new number by the original number
45 - 56 = -11
-11 ÷ 56 = -0.19642857142857142
-0.19642857142857142 x 100 = -19.64%