-52.78% is the change from 72 to 34
Calculation steps:
[( 34 - 72 ) ÷ 72] x 100 = -52.78%
Formula
Percentage change = [(34 - 72) / 72] x 100
Subtract the new number by the original number
34 - 72 = -38
-38 ÷ 72 = -0.5277777777777778
-0.5277777777777778 x 100 = -52.78%