-80.4% is the change from 796 to 156
Calculation steps:
[( 156 - 796 ) ÷ 796] x 100 = -80.4%
Formula
Percentage change = [(156 - 796) / 796] x 100
Subtract the new number by the original number
156 - 796 = -640
-640 ÷ 796 = -0.8040201005025126
-0.8040201005025126 x 100 = -80.4%