-50.63% is the change from 158 to 78
Calculation steps:
[( 78 - 158 ) ÷ 158] x 100 = -50.63%
Formula
Percentage change = [(78 - 158) / 158] x 100
Subtract the new number by the original number
78 - 158 = -80
-80 ÷ 158 = -0.5063291139240507
-0.5063291139240507 x 100 = -50.63%