-30.56% is the change from 72 to 50
Calculation steps:
[( 50 - 72 ) ÷ 72] x 100 = -30.56%
Formula
Percentage change = [(50 - 72) / 72] x 100
Subtract the new number by the original number
50 - 72 = -22
-22 ÷ 72 = -0.3055555555555556
-0.3055555555555556 x 100 = -30.56%