-12.82% is the change from 39 to 34
Calculation steps:
[( 34 - 39 ) ÷ 39] x 100 = -12.82%
Formula
Percentage change = [(34 - 39) / 39] x 100
Subtract the new number by the original number
34 - 39 = -5
-5 ÷ 39 = -0.1282051282051282
-0.1282051282051282 x 100 = -12.82%