-42.65% is the change from 136 to 78
Calculation steps:
[( 78 - 136 ) ÷ 136] x 100 = -42.65%
Formula
Percentage change = [(78 - 136) / 136] x 100
Subtract the new number by the original number
78 - 136 = -58
-58 ÷ 136 = -0.4264705882352941
-0.4264705882352941 x 100 = -42.65%