-29.09% is the change from 55 to 39
Calculation steps:
[( 39 - 55 ) ÷ 55] x 100 = -29.09%
Formula
Percentage change = [(39 - 55) / 55] x 100
Subtract the new number by the original number
39 - 55 = -16
-16 ÷ 55 = -0.2909090909090909
-0.2909090909090909 x 100 = -29.09%