-44.29% is the change from 70 to 39
Calculation steps:
[( 39 - 70 ) ÷ 70] x 100 = -44.29%
Formula
Percentage change = [(39 - 70) / 70] x 100
Subtract the new number by the original number
39 - 70 = -31
-31 ÷ 70 = -0.44285714285714284
-0.44285714285714284 x 100 = -44.29%