-45.07% is the change from 71 to 39
Calculation steps:
[( 39 - 71 ) ÷ 71] x 100 = -45.07%
Formula
Percentage change = [(39 - 71) / 71] x 100
Subtract the new number by the original number
39 - 71 = -32
-32 ÷ 71 = -0.4507042253521127
-0.4507042253521127 x 100 = -45.07%